Yeah, the idea of having a roleplay when your base goes through soldiers like copy paper is probably not the best idea, considering your soldiers are likely to die before any kind of significant relationships can get underway. I don't want to sound pessimistic (I spent most of season three having Ayame say the exact opposite of this, in fact), but what's the point of getting attached to anyone when the Commander might as well say, "Look at the man to your right. Now look at the man to your left. Chances are, both of these men will die. As will you... Whelp, who wants lunch?"
And as far as things like Ayame and Anna getting very little mission time, at least they (and we) were there. If I remember correctly, Ayame only had one or two missions, mainly because she joined near the end, she wasn't a sniper, so Odd didn't give her special treatment (for goodness sake, man, her first mission was a terror mission, and you got her punched in the face by a chryssalid, you could have given her a better chance). But at least we were roleplaying, despite not going out there. I thought the decision to only allow active soldiers to roleplay in season four was a monumentally shortsighted idea, as was that one journal per week crap. What was wrong with how season three worked, seriously? I loved season three, and I loved watching the season three videos. Now I just can't be bothered.