Now I only took a vague glance at the changes because most of them are bound to change during beta anyways, but from my initial view I REALLY!!! don't like the haste changes to dots.
Because from what I gathered it's gonna work in a way that if you have x amount of haste your gonna get another tick right, so stacking anywhere inbetween x and y is gonna be.. Useless (It will still affect your casts and such but you see my point).
Another issue is that we can't clip dots ? Sure it's a welcome change on some fights where you are forced to clip dots because it's a dps gain (Marrowgar Heroic during bonestorm when he moves out of range and theres a spikes to nuke being one of them or putricide before phase transitions) but I can't help but feel that Blizzard is giving us.. Training wheels
Please feel free to correct me if I have got this all wrong.