1) Loss of specific spell power lines. This hurts all of my alts, some pretty severely.
2) The "points spent in tree" gating mechanic. This is fundamentally more restrictive than what we have on live just by its very nature.
3) The three tree limit. This is a nerf to multiclassing, period.
I don't see any way those screws will be loosened.
EDIT: It should go without saying, but just for clarity, the cleric trees are a complete trainwreck and need to be thrown out and redone from the ground up. Give us three cleric trees: one for healbotting, one for offensive casting, and one for melee.