Here's something that's specifically and clearly stated in the rulebook as being legal. But people would still have a problem with someone doing it. They wouldn't get mad at the people that wrote the admittedly defective rules in the first place.
You seem to be assuming that it's a 'one or the other' situation. Can't people be mad at you AND at
GW?
The rule on base sizes is there to allow people to make their character models a little more flashy. Yes, it's badly written, and allows a certain amount of abuse through creative modeling, as do quite a few other rules in the game.
Taking a rule that is intended as a modeling choice to give your models a perceived advantage is never going to win you friends.
But I still don't think this will give you the advantage that you think it will. Seriously, cut out a stack of 60mm circles, bung them on your grots, and actually try it.