Yes, so far. The undead servant was nerfed into uselessness, too.
None of the UA wizard variants strike me as overpowered, though.
The one you're probably interested in - Rapid Summoning - is one of the better ones, since spending an entire round casting a Summon Monster spell can be quite troublesome. Still, a normally summoned monster gets to make a full attack, whereas a rapid-summoned monster is only guaranteed a single attack and then sits around as a target until its next turn, if it survives that long. There's a balancing factor right there.
The Enchanter variant that provides a cohort without having to spend a feat on Leadership is quite nice, too. But you're an Enchanter in a world with Telepath psions, Protection from X and eventually Mind Blank, so there's that. Your 'free' cohort is just a much needed shoulder to cry on.