Nahat Anoj
First Post
In general, I think the PH 2 classes are definitely more polished and coherently designed than the PH 1 classes. PH 2 classes tend to have just one primary ability score and allow players to choose one of two neat class features based on secondary ability scores. The PH 1 classes that are most comparable to this are the rogue, warlord, wizard, and fighter (in that order, IMOI think the real question is: do they outshine the PHB classes, and if so by how much?

I don't think the PH 2 classes are necessarily more powerful than PH 1 classes, but they do seem more interesting in terms of how they fulfill their roles. The only PH 1 class that seems weaker than its PH 2 counterparts is the wizard, and that's mostly because the wizard at-wills just don't seem to highlight the controller nature of the class as much as invoker and druid at-will powers do.
Perhaps the largest issue for me is that, if the PH 1 classes were designed according to PH 2 principles, the cleric, ranger, warlock, and paladin would all have one primary attack stat. I think the design team saw these warts quite some time ago - every new class since PH 1's release follows PH 2 design principles. Hopefully one of these days we'll see a major 4e update that redesigns these classes according to the PH 2 principles. But, with Wizards' design schedule - Martial Power is out, Arcane Power is imminent, and Divine Power will be out later this year - I don't think this will happen for another couple of years at the soonest, if it ever happens at all.