Has anyone else noticed you're all fighting the same few teams? Its variations of the same few powerful characters. Whether they are 4* or 7*. Examples are: Sid, Dooku, Bariss, Opress, random Jedi, and maybe the occasional old Daka. I've pushed many characters up in gear, stars, and levels. In the hopes that some of them would be superstars who could beat the same team line ups.
Instead I've just wasted time, money, and resources which could have been put into top characters. These guys, the ones we know, are the heavy hitters. I'm finding very little if anything which can displace the top dogs. So don't waste time upgrading that coruscant police or something else similarly lame. Push your best characters to the top and ignore the rest.
Maybe some of the new characters coming out will be good and bring balance to this game.