You all have been spoiled by the super-long duration of the buff spells as they exist in the 3.0 rules. When I hear people saying, "I'm never going to cast Bull's Strength again because it sucks with duration 1 min/lvl," all I can think is, "Are you completely insane?"
In Krug's other thread (the poll) I outlined all the many, many benefits that you get from stat-buffing spells, everything from increased AB to Saves to pumping up your spell save DCs to carrying capacity to AC to Init to skill bonuses, etc. etc. etc. So now those many, many benefits only last a short time instead of all day.
Good! That will force your PC to apply them selectively, instead of permanently. You'll only buff up before tough fights that you know about, instead of entering all combats pre-buffed. You'll only buff up your Strength for those really hard-to-open doors or difficult-to-scale cliffs instead of buffing it just to carry more crap. You'll only buff up your Int/Wis/Cha when you really need a high spell save DC against a key enemy, instead of having a stackable Spell Focus: Everything all day long.
How is this bad? Because the PCs are no longer semi-permanently enhanced via 2nd level spells? I don't understand that argument. We should want the PCs to walk around in a haze of transmutation effects?
Bah! I guess I play a different game. I'd like the PCs to rely on their innate stats, abilities, skills, and feats, temporarily enhanced by 2nd level spells in key situations. I would not like the PCs to cast the same suite of spells at the start of every single day, because to do otherwise is sub-optimal to the point of foolishness.
That would be limiting player choice, as surely as the 3.0 version of Haste did.