People who played it at launch were generally harder on the endings. Obviously no EC/Leviathan is a factor, but the people who are just playing it now are likely to have less invested (both in terms of time and emotions) in the trilogy leading to easier acceptance of the endings.
Don't really care so much now. Just want ME4 to be great, whatever form it takes.
I wasn't a fan of the ending but I honestly didn't care all that much (played it at release). I just can't get angry about a game I had so much fun with because the ending isn't what I wanted. In this case it really was journey over destination. When "An end once and for all" started playing I didn't think about the ending itself at all but about all the great moments leading up to it and all the characters I became so invested in over the course of the series. It was one of the most emotional moments I had playing games so far.
I'm actually playing through the entire series again at the moment and I have to say that I don't see the problem with restricted freedom/customization and too much shooting at all.
People seem to forget that ME1 had a whole lot of shooting as well, but there was just less content overall. Some of it wasn't even that great. A lot of the sidequests take place in random, nondescript compounds, filled with enemies that like to bumrush you. On Feros the sidesstuff is just a bunch of fetchquests. You go to a rather dull looking area, shoot a bunch of stuff, activate/destroy/pick up something and that's it. And while the Citadel is indeed fairly large, there isn't all that much to do there. Mass Effect 2 has quite a few sidequest that don't involve combat at all, in fact you don't fire a single shot in two of the loyalty missions.
As far as customization goes, yes, there is more gear in ME1 than in the other two games, but I already had fairly decent stuff rather early in the game and you get a ton of junk loot that's kind of a pain to get rid off (I had so much omnigel by the time I was done). I would have prefered it if they had built on that rather than streamlining it but I don't think it was worse.
The advantages ME1 does have, is that it introduces you into this amazing universe (so many exposition dumps during conversations), it has great antagonists with Saren/Sovereign and a great ending. ME2 has an almost episodic structure since most of the recruitment/loyalty missions have their own narrative that's not directly tied to the main story which I personally like a lot.
In the end I have a hard time ranking these games because I think they're all fantastic. I appreciate that there isn't a lot of fluff in them, something that Inquisition suffers from imho. I still like Inquisition but I do hope they won't go down that path too far for ME4. I'd rather have a 20-30 hour long game of quality content than a game like Inquisition where I end up with 80-100 hours but most of that is spent running around doing fetchquests or picking up collectibles.