Improvements over Recovery:
More complicated rhyming (more consistent, at least; Recovery had so many verses with single-syllable rhymes)
No more choppy flow
More varied delivery (Reunion, Kiss, Lighters especially)
Great production
I think the "screaming" people are complaining about is like the accent on Relapse. First of all it's not as common as people are making it out to be - Relapse only had the accent on some songs; Em's only yelling on a select few here as well. Second, once you get over it, it's fine. The accent made a lot of Relapse songs sound great; his yelling is great here too, especially on Echo, Welcome 2 Hell and Loud Noises.
Great EP, gives me hope for future releases

edit: Also, ECHO SHOULD HAVE BEEN PUT ON THE ACTUAL EP. I don't get why they'd leave it off just because it was leaked...what difference does it make?