Nah they done it , because SA was overloaded.
They told it earlier that they will delete "useless" options.
I think next part will concentrate more on graphics and story and not new features, sure there will be some but not much.
but A plane would be nice.
GTA4 would be 10000000000% better if it had real remote-detonated bombs.
Word.
And maybe a tank, but not so much as remote bombs.