If I could make a change to the new X-com, it would be to allow shooting even if there's not a target. There have been a lot of times I wanted to simply blow out a UFO wall with plasma weaponry and it sucks that you can't do it unless you have spare rockets and grenades.
Though blaster bombs in the original were just too good. I greatly enjoyed capturing an alien commander by blowing a hole in a battleship roof and having my troops with flight armor drop in on the commander. I imagine having that animated would have looked like them all flying in and airlifting the unsuspecting commander straight out of the ship.
I've never had this work, and I have no idea why. I've let at least 4-5 UFOs go and never gotten a satellite shot down.