I just want to clarify a few things - the first is that I am actually a fan of Pathfinder and merely expressed my concerns, but am definitely not a detractor. Jason has actually stated that many of these concerns have been addressed in the final version, but he cannot reveal the changes yet, so I guess we are discussing the BETA. Hopefully, some previews will soon shed light on some of the solutions adopted.
As to hit points, it is only one of the increases to overall power level and I just chose it as a particularly gratuitous example - but there are obviously many other small boosts. As has been pointed out, the boosts to hit points are not huge overall (though in some cases, such as Wizard or Sorcerer, these are actually pretty big boosts in relative terms), but they do add up together with the other power increases. I hope these increases have been toned down (not necessarily eliminated completely, since some of them serve useful functions that justify the power increase) - I guess we will soon get some indication in the previews.
As to the CoDzilla question... the BETA has addressed this to some extent. The Druid has been significantly toned down with the mega-nerf of Wildshaping (some might even say this particular nerf went too far), though in other areas less so. On the Cleric side, I don't think this has been addressed to a great degree in the BETA (though we don't know about the final version) - there were some nerfs, but the Channel Energy (as much as I love the ability) is very, very, very powerful when the campaign involves going against the undead. It might be wise to tone out the healing/damage output per use of Channel Energy in return for more uses per day and perhaps the ability to use it as a move action (which would also give the Cleric the opportunity to do other things) - perhaps something like this was done in the final version - we will see.