Well one thing it does do is let you say "Fuck that, I'd rather lose on my terms than win on yours", so there's that. But past that? Well, hardly any of the major complaints is addressed, no? The kid is still there. The pick your color is still there.
Yeah, they did make up some new stuff so that the entire Normandy thing makes more sense, but, uh, it looks a little convoluted and other things making less sense because of it. I mean, seriously. Joker, Tali, Garrus just going "Oh okay, screw Shep then"...yeah. That totally makes sense, doesn't it.
Note, I've only checked youtube videos.
I can see how people are at least a little satisfied, but ultimately, it's just polish. Plus, note that I'm one of those people who don't think ME3 was cancer-curing awesomeness before the ending, it was a mediocre to slighly above average game in general from what I've seen of it. The Rannoch part was done well. The Citadel invasion was done well. The rest...meeeeh.