2 is kind of irrelevant, Lib dems will loose out no matter what happens if the coalition isn't very lucky. There best bet will be to blame it on the other party.....
1, well the Lib Dems and Labour don't see eye to eye on many things, Labour do quite well by the current political system, they don't want to change it. The tories might be able to come up with some rotten thing where by they and the lib dems re-define the boundaries in a way which can help them both..... I will hate it when this happens.