Another things I might add to the list is:
Attention to the details. For example I played ME3 recently and noticed how bad some details are like:
1)Turian soldiers using the Avenger assault rifle when they should have used the Phaeston (Turian assault rifle)
2)Salarian soldiers using the Avenger assault rifle instead of Venoms or a salarian based weapon
3)Asari usings the Avenger instead of Asari made weapons like the Disciple
4)Quarians not using the Adas or the Reagar Carabine
How could it be that every species use a human made weapon? Is the Avenger the AK47 of ME?
I do know that some of these weapons appeared later due to MP DLC but I think they should be more attentive to details like this when they design the weapons of the main game as to have all major species covered with their own weapons. It feels like cutting corners of little impact but for some reason I notice these things immediatly. Kind of hope they pay more attention to these kind of things.