Tony Vargas
Legend
Ah, but said spells are iconic, so they just absolutely must appear in the PH...Really? I am not saying that people really are avoiding those spells (because I don't know, but overall I don't think it's the case... losing concentration is annoying but I don't think people avoid concentration spells entirely) but if they really did, it's not an astounding success but an astounding crap of wasted design effort... if they really wanted to limit those spells to the point that nobody uses them, then they should have not have those spells at all.
Seriously, though, Concentration is a meaningful limitation. Spells with concentration feel limited. That's the point. Haste, for instance, has been a powerful, even problematic spell at times, concentration serves to limit it without actually taking away that power. Sure, there are other spells that hardly seem to 'deserve' such a limit, but not being able to use /them/ and the spell that actually deserves the limit at the same time is still a limitation on both...