BIGGEST COMPLAINT:
Epic strikes all share a cooldown across destinies. With that, and the mantle exclusivity, there is nearly nothing for people to branch out into 2-3 trees. Before, I could breathe dragonfire, energy burst and drop a consecration. Now I can do one of those things even if I have the ability to do all three. Go ahead, look at all non mantle, non epic strike abilities and you tell ME what is worth taking other than passive things like increased melee damage (+1 to hit/+1 point of damage per rank at EPIC levels) a few HP (again at EPIC levels) and modest saving throw bonuses.
OTHER COMPLAINTS:
1) Eliminating staples like Dire Charge because people used it too much, instead of just creating other feats which make player choices more difficult. C'mon man...
2) Weakening the highest tier abilities simply because you can't formulate more fantastic abilities for levels 30-35 and will instead retread them for use at the new "level 30." I used to be able to trip on vorpal. Now I can daze on vorpal, which of course goes away after ONE hit. Compared to stunning fist, that's ****, and you can get stunning fist at level 2.
3) Combining Druid Melee and Barbarian melee on one tree so you can go further with the whole druid spellcasting thing even though it's just a terrible concept out of the gate. "Oh look! I'm weaker now with fire but better with cold! Oh no! it's changed the other way!" Who cares? It's terrible.
4) NOT doing the one thing you should have done, which was more of what you had done when you first released Epic Destinies. Instead, it's like you FORGOT how to develop good content. I am baffled completely.
IN SUMMARY (TL;DR):
You made epic levels trash. Congratulations.