Eddie Jones has slammed efforts by the sport's ruling body to make the game more entertaining through the introduction of ELVs.
The Saracens director of rugby and former Australia coach has warned that the law changes - such as legally being able to collapse the maul and no player restrictions at the line-outs - are in danger of trivialising the sport.
"The important thing is to improve rugby. To judge the ELVs you have to ask 'have they made the game better?"' said Jones, a highly respected figure who led the Wallabies to the World Cup final in 2003.
"Better does not necessarily mean more entertaining. If you want entertainment you watch Twenty20 cricket. We don't want rugby to be Twenty20 cricket."
Dwindling club attendance figures in the southern hemisphere prompted a rethink by the International Rugby Board into the way the game should be played.
But while the SANZAR nations struggle to attract fans, the northern hemisphere is enjoying an unprecedented boom in popularity that runs from club to Test level.
And Jones warned that if the ELVs become permanent the new brand of rugby could start to turn fans away from the sport in Britain and Europe.
"Just have a look at what the World Cup has done in Europe. Rugby in France is big now - they had four club games with 80,000 crowds last season," he said.
"Rugby in France is going through the roof because the World Cup was so successful.
"Watch Bath against Wasps in January - it was one of the best games I've ever seen. There were unbelievable skills levels on show.
"It had everything. If a game is played well and refereed well then there is nothing wrong with it. If you play the game well then it becomes a spectacle.
"If you try to make it a spectacle first and foremost, then you get a simplistic version."
And Jones put forward an idea suggesting two forms of the game can run parallel, with a shortened version mirroring cricket's Twenty20.
"Now there's Test match cricket and Twenty20 cricket but we need to keep Test match rugby.
"Around the world most people want to watch Test rugby. There are pockets around the world who want to see Twenty20 cricket so let's make Twenty12 rugby.
"We could have 12 players, 20 minutes each way with no scrums or line-outs. As the game becomes more professional another form of the game could develop. Sevens hasn't been a success as entertainment.
"It might do well in Hong Kong and Wellington, but around the world. You might find another form of the game springs up eventually."

England 9-18 Australia - Highlights
Harlequins 15-15 Llanelli - Davies
Harlequins 15-15 Llanelli - Robshaw
Harlequins 15-15 Llanelli - Owens
England 9-18 Australia - Wilkinson & Moody
England 9-18 Australia - Johnson
England 9-18 Australia - Giteau
England 9-18 Australia - Genia & Ashley-Cooper
| Time | Fixture |
|---|---|
| Guinness Premiership | |
| Friday 20th November | |
| Guinness Premiership | |
| 19:45 | Gloucester vs Leicester |
| 20:00 | Worcester vs Bath |
| Saturday 21st November | |
| 13:00 | Northampton vs Harlequins |
| Sunday 22nd November | |
| 15:00 | London Irish vs Newcastle |
| 15:00 | Saracens vs Wasps |
| 15:00 | Leeds Carnegie vs Sale |
| Friday 27th November | |
| 19:45 | Sale vs Wasps |
| 20:00 | Newcastle vs Northampton |
| 20:00 | Worcester vs Saracens |
| Saturday 28th November | |
| 15:00 | Harlequins vs Gloucester |
| 15:00 | Worcester vs Saracens |
| 15:00 | Leicester vs Leeds Carnegie |
| 17:35 | Bath vs London Irish |
| Saturday 5th December | |
| 15:00 | London Irish vs Worcester |
| 15:00 | Northampton vs Bath |
| 15:00 | Gloucester vs Newcastle |
| 17:35 | Saracens vs Sale |
| Sunday 6th December | |
| 15:00 | Wasps vs Leicester |
| 15:00 | Leeds Carnegie vs Harlequins |
| Saturday 26th December | |
| 14:15 | Bath vs Gloucester |
| 15:00 | Leicester vs Sale |
| 15:00 | Worcester vs Northampton |
| Sunday 27th December | |
| 15:00 | London Irish vs Saracens |
| 15:00 | Newcastle vs Leeds Carnegie |
| 16:00 | Harlequins vs Wasps |
| Result |
|---|
| Guinness Premiership |
| Sunday 1st November |
| Guinness Premiership |
| Newcastle 14 - 3 Worcester |
| Wasps 9 - 15 Leeds Carnegie |
| Saturday 31st October |
| Leicester 29 - 15 Northampton |
| Harlequins 9 - 9 London Irish |
| Bath 11 - 12 Saracens |
| Friday 30th October |
| Sale 28 - 23 Gloucester |
| Sunday 25th October |
| Saracens 21 - 15 Leeds Carnegie |
| Saturday 24th October |
| Gloucester 6 - 35 Wasps |
| London Irish 18 - 12 Leicester |
| Northampton 21 - 16 Sale |
| Worcester 22 - 26 Harlequins |
| Bath 16 - 27 Newcastle |
| Sunday 4th October |
| Leeds Carnegie 10 - 26 Gloucester |
| Wasps 20 - 15 Northampton |
| Newcastle 15 - 22 Saracens |
| Saturday 3rd October |
| Harlequins 13 - 11 Bath |
| Leicester 19 - 14 Worcester |
| Friday 2nd October |
| Sale 8 - 11 London Irish |
| Sunday 27th September |
| Saracens 19 - 16 Gloucester |
| London Irish 28 - 16 Wasps |
| Saturday 26th September |
| Bath 20 - 20 Leicester |
| Worcester 24 - 18 Sale |
| Northampton 30 - 10 Leeds Carnegie |
| Friday 25th September |
| Newcastle 17 - 17 Harlequins |
| Sunday 20th September |
| Wasps 23 - 3 Worcester |
Jonny Wilkinson told The Rugby Club he hopes to play with new-found freedom against Australia on Saturday.
Aussie Matt Giteau tells Rugby Club that he is keen to avoid a repeat of his first Twickenham outing.
Back Nikolai Valuev, Didier Drogba and Jonny Wilkinson this weekend, says Ed Chamberlin.
Cardiff Blues won their LV= Cup clash against Gloucester thanks to a last-gasp penalty from Ceri Sweeney at Kingsholm.
Dan Carter has been cited for a dangerous tackle on Martin Roberts during New Zealand's 19-12 win over Wales.
Harlequins and Scarlets shared the spoils following a tremendous battle in their LV= clash at the Twickenham Stoop.
Wasps withstood some late pressure to earn a hard-fought 24-20 LV= Cup triumph over London Irish.
Joe Ford scored 18 points to help Leeds record a 28-17 triumph in their LV= Cup clash with Leicester at Headingley.