Bingowings said:

This may be unpopular as we have just had three crap films where droids fight troopers but A) The idea wasn't bad it was the execution

Actually the idea itself is bad. Maybe not for a hardcore sci-fi film but it certainly is for Star Wars. When you see a rebel or a stromtrooper you know this guy fights for something, has some backstory, has a family somewhere, came from somewhere and his death will affect people. As for clones and droids, they completely unappealing and boring. And a war is boring if it is fought between clones and dorids. It has little affect on galactic population. It is like kids playing battles with toys soldiers, while adults don't care about it.