Like title says, I'd like a better Abort Mission. I mean, if a unit is in the Ship, and you hit abort mission, you'd think the craft would lift up and return to base. Instead of just being destroyed along with all soldiers. One thing I liked from the original X-Com was that if a mission ended up going bad, I could abort the mission with my remaining survivors. In Alien Invasion, however, all missions are Do-or-dies. You CAN'T abort to save troops/planes.
P.S.: I play this game like I do the original X-Com. That means no retries if a mission goes down horrendously.