Pitts, I don't know where 3 years comes from for the 330 - there are CTC guys and girls going on it now who have been with us less than 2 years and they're only going on it as they haven't got the hours for command this winter, the time for which will be sub 2 years after this winter's lot. Some ex-easy chaps got the 330 much quicker than this so, for once, I would believe what you were told at your interview.
LTN is by far the best place to be based on the 320 until they start schedules from there at the rate the MAN and LGW guys fly (will be a few years yet I think). On the 320 you will do BHX, EDI and AGP voyages but next year there is quite a bit more LTN flying so will be away much less.
And ER the SA hasn't changed our weekend day entitlements - that's the way they've always been - phone GM/AM and ask them!