I recall a few months ago someone was being all negative about MEA and was talking up how great Fallout 4 would be and I questioned the validity of the claims to compare one game that hadn't come out yet to another game that hadn't come out yet.
I don't think it's wise to have all these "What can Bioware learn from...." whatever it is they can learn from.
Bethesda is a gaming company that specializes in open-world sandbox games, something that Bioware isn't as good at, but Bethesda has always had problems with characters and story, something that Bioware excels at, and almost all of Bioware's games have got me emotionally invested in its characters and the story, whereas Bethesda's games have me going "well, I can be what I want to be...." but I'm not that invested in the characters.
I had more emotions from one side quest in Oblivion than I had for the entirety of its main campaign, and that was when I was in the Dark Brotherhood and killing those five people at the party while avoiding being discovered.
Bioware should stick to its strengths and not try to be too much like other games.
I don't mind exploration or quality side-content, but it shouldn't overshadow a Bioware game's strong points.