Panda, agree with you on a couple of points. On top of the ones you mentioned, I also didn't like Superman making lame, empty threats at Darkseid, like, "And don't come back!", after getting the shit kicked out of him.
The Doomsday scene was explained by someone in IMDB and their take is that the monster was cloned using leftover DNA (or something like that), that would make the clones a lot weaker.
There's a new, short movie out called Green Arrow that I'll be watching next.