I never got that feedback about magic-users. Though there's been some changes to the ability score roll process, there's never been pressure to play a magic-user with less than a +1 bonus from INT. The feedback I kept getting on that class was repeated requests for confirmation that magic-users could use any weapon. It was thought to be typo.
The main complaint about spellcasting was from a player of a cleric with a very low STR. He was pretty much stuck with just a sling or staff after his one or two spells.
Now though, there's always an option for high STR with a cleric which makes maces and hammers much more viable. But, depending on the CHA/WIS roll, they may be limited to a low initial spellcasting limit (low CHA) or low max spellcasting limit (low WIS).