Nope. So long as everyone understands the reasoning behind it. I recently, as a minor tweak, doubled the shield bonus of small and large shields in an attempt to make sword and board fighters more viable. The players jumped on it and one of the players centered his new PC around the concept.
Heck, I play in the WLD. There's all sorts of changes to RAW in there - nerfing Web spells, nerfing extradimensional anything, nerfing summoning, no free spells in spellbooks for wizzies, just to name a few. The game's coming up on its one year anniversary and still going strong. Not bad for an online chat game.
So, yeah, player's are usually pretty groovy with changes to core. The odd whinge now and again, but, that's just normal.