It didn't anoy me per se, Wrex's humorous one liners if you got a paragon route in all 3 games with him. Plus the car dealership scene of him jumping out of a window to find Shepard while in a imprlortant diplomatic meeting shows his loyalty to those loyal and close.

But I also did wish we got to have the full crew of the Normandy from ME1-ME3 but then again, Wrex and Grunt have important roles, Mordin died, Jack being I guess a instructor/teacher. But I did wish we had more people of everyone at the end.

I was a bit sad when I first played ME3 that we didn't have a krogan.

It would have made sense if We get that squadmate after priority: Tuchanka since that is how you unlocked the others by completing a relatera priority mission. Where would they have been staying while on the Normandy?

Well I can imagine zaeed's room and your right would make sense after the mission @Lethal blade00

^Zaeed’s room is taken up by Diana Allers.