You got it. That magic-user can cast 4 levels worth of spells per day, from their experience level of 2 plus their INT modifier of 2. And that can be spent on four level 1 spells, two level 2 spells, one level 4 spell, etc.
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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).