One of the hopes I had for the enhancement pass was that there would be a wider variety of enhancements to support a wider range of playstyles. For some classes, this was realized. I am especially happy with how clerics got an offensive spell-casting tree, and barbarians can choose not to kill themselves for more power. For others, though.... not so much.
Wizards, Sorcerers, Artificers and Fighters seem to be missing something, imo.
In the case of sorcerers, it's because all they do is nuke using one or two elements, just like they did beforehand. Every sorcerer is a Savant. *yawn*
For wizards, it seems to me that while palemasters got a huge buff, archmage isn't much more than a copy/paste of the old archmage PrE. AM doesn't really stand up much against the survivability of PM.
As for artificers, they got a combat tree and a spellcasting tree. What they didn't get was a trapping/rogueish tree. It would be nice if they had something similar to the rogue's mechanic tree.
Finally, fighters seem a bit weak in terms of the choices they get. Stalwart Defender is very solid for someone who wants to use a shield, but not everyone wants to do that. Kensai is useful, from the standpoint of offense, but some of it's abilities can't be used unless one multiclasses into monk and doesn't wear armor. Fighters feel kind of weak in comparison to the other melee classes now. I find it funny how this class didn't get a tree that rewards high charisma when they were making the PDK iconic. Very odd.