New regulations extending the powers of television match officials received a mixed reaction on Saturday night after they were debuted in the Aviva Premiership.
In matches broadcast live on television this season, the referee can now ask the TMO to rule on any incident between the last stoppage in play and the ball being touched down.
Sir Clive Woodward blasted one trial, which increases the use of video technology in the awarding of a try, as "a shocking new rule" while Wasps director of rugby Dai Young said he "would be a supporter of it".
Woodward was reacting to Wasps wing Tom Varndell having a potential try chalked off in his side's 42-40 defeat to Harlequins because of a forward pass early in the move, near the halfway line.
The former England coach tweeted: "Shocking new rule - TJ (touch judge) will follow the ball, very dangerous re foul play + totally changes the game, awful."
Young and Harlequins counterpart Conor O'Shea both suggested the regulation could be restricted to just the last few phases of play, as is currently being trialled in South Africa's Currie Cup.
"I won't argue. It was a forward pass," said Young.
"There are more tight games in the Premiership than any other league and everybody wants to get the right result so I would be a supporter of it.
"In South Africa you can only go back two phases and that is maybe the way forward, but I think it is important that we get these results right."
O'Shea added: "We don't want to be going back 559 phases and seeing what is going on. If you look at every driven maul, every scrum there will be (penalties). It is not that people go in illegally at the time, it just happens. It is a dynamic game. We will have to let it settle a little bit."
- Sir Clive Woodward