Mistwell
Crusty Old Meatwad
It would depend on the pace of the game.
The context of this rule is obviously a game where cantrips are being used to effect commonly.
If the context was a game where wizards have enough or almost enough spell slots without cantrips then the rules change makes no sense.
If the context was a game where offensive cantrip were not used to effect already, the rules change makes no sense.
If it is a game where cantrips are needed and used due to the pace and scope, then the most obvious non-cantrip replacements are the guys who substantial infinite attacks by weapons on top of full spells.
So, you have to consider where you are starting - you campaign where the nature of the beast results in cantrips not being used offensively means this change just would not be made.
You act like there are games where wizards have no choice as to using attack cantrips.
I say again, I think they are overrated. For ANY type of game, I think they are overrated. They're not the best cantrips in my opinion.
You seem to want to define this scenario as "This only would happen when everyone agrees it would not be a good thing to happen". That does not appear to be the scenario described. Lacking further information (and he's made it clear he does not want to provide further information on why) I am not going to speculate. So, I am just taking an average. And I am saying on average I think wizards would be much more popular because they already want more spell slots more than they want to use attack cantrips at mid and higher levels.