Story-wise it's hard to tell for sure because EDM's story isn't quite over yet, but it looks like some sort of balance between good and evil is reached at the close of both blocks (calling them 'good' and 'evil' for the sake of simplicity). The difference seems to be that at the end of AVR, both sides were at the height of their power, the bad guys because they had been left unchecked for too long, and the good guys because of Avacyn's return and sudden power boost. At the close of EDM, I expect some sort of balance to be restored as well, but that would be due to the fact that a lot of monsters as well as humans died and both sides are seriously weakened (assuming the Eldrazi mutants will just die when Emrakul is locked away). The plane is probably a lot more wrecked than at the close of the first block. And I think they didn't really know what to do with some of the characters in EDM, while it was a bit cleaner in AVR (then again EDM isn't quite over yet, and Tamiyo, Tibalt and Sorin didn't get any screentime in AVR either, so it's probably not that much of a difference in that regard).
Comparing the look and feel of AVR with that of EDM, I'm way less bothered by AVR. The problem I had with AVR was that there were suddenly angels and angel-related cards everywhere (and gryphs, which looked totally out of place for me back then), the werewolves and all other DFCs were just gone, and the whole thing was generally a lot lighter in tone (literally). But at least the horror things that were still there were allowed to be what they are; vampires were still vampires, ghouls were ghouls etc. With EDM, a lot of the formerly cool things were just ruined by being eldrazified. Sure, EDM has DFCs, but the werewolves are also de facto gone (Ulrich is kinda lame and the others are eldrazi on the back). Or take cards like
Weirded Vampire. There is NOTHING about this amazing classic Nosferatu-inspired scene (vampires lifting themselves up from bed/coffin in gravity-defying way) that's in any way improved by having weird flesh structures growing out of the vampire's back. Vampire Horrors with tentacles and rubber-necks don't have a place in any of my vamp decks. I'd rather have less of a cool thing but at least see that cool thing done properly instead, as it was with AVR.