The first thing you need to do is pull the front speakers out from the wall and screen. That is destroying your front stage. If you are 12ft away, the speakers should be somewhere around 10-12ft apart as well...but you can get away with them closer together most likely, but where you have them now looks too close for 12ft away (I wouldn't sit any further away). I would also put the cener on top of that stand and pull it completely flush with the front end.
Yes, the surrounds look like poor choices in basically each case.