Skirmish map sorting
Select air hot key (F2)
Add someone as a friend from the MP lobby
Skirmish map sorting is already in and was in the previous 2 patch notes too (came with first of those). Unless you mean something beyond the current implementation
F3 already selects air units, though it is a bit buggy as it makes a very loud noise when you press it and then no path lines appear when you direct them. F2 is currently for idling factories I think.
Add someone as a friend from MP lobby is also already in.