Here is where I'm at: Better than the prequels...worse than the originals. I gave it 6.5 to 7 rating.
1) You can certainly drop bombs in space! The ship they are being dropped from has gravity. Therefore the bombs drop from the ship. Once they hit open space they continue on their path at the same speed until they hit something.
2) You can survive in open space for several minutes. In fact you would die of suffocation before you would die from freezing.
3) Leia has always been strong in the force. She's used it to some degree in every movie she's been in. Makes sense that she would be even stronger with it at this point.