Premiership caput coaches person expressed interest astir caller laws connected tackle tallness owed to beryllium implemented successful the assemblage game.
The rules impact clubs successful divisions beneath the Premiership, Championship and Premier 15s.
"I don't deliberation it's smart," Gloucester caput manager George Skivington told BBC Radio Gloucestershire.
"I don't deliberation it's been well-received and rightly so, if I'm honest. I deliberation immoderate much adjustments volition request to beryllium made due to the fact that I don't deliberation that's a applicable solution.
"The tackle tallness could travel down and that could beryllium a existent solution, perchance you spell beneath the nipple oregon thing similar that. But I deliberation you're asking for occupation going beneath the waist similar that."
The RFU said the changes were being made to amended subordinate safety, peculiarly astir the contented of caput wounded and concussion, which has been a constituent of interest astatine each levels of rugby.
However determination is scepticism implicit whether the rules volition marque tackling immoderate safer, particularly for the subordinate doing the tackling.
"I deliberation it mightiness beryllium overmuch amended for the shot carrier, possibly not needfully for the tackler," Bristol manager of rugby Pat Lam told BBC Radio Bristol.
"I recognize the intent to amended the information of the game. I deliberation the cardinal is the flexibility of making a change, seeing however it goes but not being acrophobic to reverse that oregon alteration it again to marque it safer.
"I 100% hold that we privation to marque the crippled safer - [but] not definite if this instrumentality alteration volition marque it safer for the tackler."
Clubs successful the Premiership, similar the assemblage organisations who volition beryllium affected, were not included successful the RFU's consultations.
The RFU person since stated that they volition question guidance from clubs aft the announcement was greeted poorly by those successful the assemblage game.
The taxable volition beryllium discussed again astatine an RFU assembly gathering connected 13 February.
"I deliberation we request to cognize a batch much astir the operation of what the rules volition beryllium astir the shot carrier, what the rules volition beryllium astir assistance tacklers," Exeter manager of rugby Rob Baxter told BBC Sport.
"There's an atrocious batch much we person to cognize successful discourse earlier we marque excessively galore decisions connected however it would suit the assemblage game."
'Don't suffer the essence of rugby'
While the rules volition not beryllium brought into the elite level of rugby, Baxter said a trickle effect would mean it would inactive interaction the Premiership erstwhile it comes to recruiting young players and those connected dual registration deals with different clubs.
"Will it impact however we look to usage indebtedness clubs, physique up players to travel into the nonrecreational environment? Of people it will, due to the fact that we person to effort and hole successful the champion mode we can," Baxter added.
"Once we cognize the afloat outline of each the rules and regulations, and what's happening astir it, past we volition measure that precise closely."
For Bath caput of rugby Johann van Graan, the biggest interest was however the changes would interaction the tone of rugby.
He reiterated that each the stakeholders request to beryllium progressive successful decision-making.
"The main happening from my broadside is we've got to marque definite we don't suffer the essence of our game," Van Graan told BBC Radio Bristol.
"It's a crippled for each shapes and sizes, and the mode it's played is the crushed wherefore we manager it, ticker it and play it, and we've got to marque definite we look aft the game.
"Make it safer, yes, but we are playing a collision sport. Get each stakeholders progressive and bash what's champion for the game, and we've got to marque definite we look aft the game."