No it's not. Saying "the controls" aren't tight is just a bad descriptive term.
The mechanics are fine, but the shooting is not just "leave your finger in the trigger" kind of shooting, like said, it's volley based.
the weapons were not homogenous unless you didn't bother customizing them with different mods and ammo types.
when people talk about RPG elements lost is about those statistical and functional variances given by those items. Making a mini-nuke heavy weapon vs a grenade launcher is the RPG vs Shooter design people complain about. You prefer one, that's fine, that doesn't make the other one "wrong".
I'm sure you played like that, but it isn't the most "optimal strategy" just because you did.
Most of the times they were more open areas, so your "connected rooms" complaint sounds false anyway. Go play it again.
Call it what you like, it was fine and any ME was a better game for its atmosphere and plot than for whatever mechanical improvements they tried to do like scanning planets or buying fuel and running from tiny reapers in the galaxy map.
Like I said, Mass Effect focused on character development almost exclusively, and had for more characters, many who benefited from already being introduced. I liked Legion and Thane and Mordin, etc. Saying Garrus wasn't Garrus until 2 is just ridiculous, tho. Wrex and Ash and Liara and Garrus were all themselvessince 1. Of course they are going to grow with more development in subsequent games, that's just common sense. It doesn't make the particular character writing unoriginal in any cases, i.e. daddy issues for everyone.