I found removal of the holster option bizarrely annoying. Can't really tell you what that power added to my experience, but whatever it was, I didn't like it taken away.
I am not for total "combat/noncombat" area segregation. I like not knowing what kind of content an area will yield, or whether I'll have to use my gun or my mind for what's beyond the next door. I did really enjoy leisure time on the Citadel in my casual outfit, and I'm not against that. I just wouldn't mind more mixed environments in addition, even if they are not large. If that isn't practical or possible development-wise, I would understand.
Seconds spent climbing an empty eventless staircase are not much different to me than seconds spent waiting for an elevator loading screen to finish. Often I see people pushing for a return of many of ME1's elements because there was more freedom or uninterrupted open-range value, but I felt that while ME1's worldspaces could be larger and more transitionally seamless, they were also emptier and refreshed less often with new content. I accept that more reactive, content-rich worldspaces come at a price, and that this price is often fewer worldspaces, smaller worldspaces, or more loading screens.