EMS was the only realistic way I could see the game acknowledging all our different decisions without having to make ie. 300 different ending videos.
The bad thing was that there were only 12-15 very slightly different endings (all variations?).
1. shep dies, squadmates survive, some people die in the galaxy.
2. shep dies, squadmates survive, some people die in the galaxy.
3. shep dies, squadmates survive, some more people die in the galaxy.
...
X. shep. allmost dies, squadmates survive, some more people die in the galaxy.
EMS feels unimportant because the outcomes are too similar.
...
Personally I like the multiplayer alot, not spending money on it though, but I find it entertaining. I do find it silly though for force anyone to play it. That was a low blow.