BR,
No I wouldnt say they are & easyJet have recruited loads of pilots recently, I think they have sent a few F/O's over to BFS in the last few months as they have upgraded some BFS based F/O's to Captains & therefore used some LTN based crew to fill the gaps, however I think that recently the crewing levels have increased so as a LTN F/O you should experience very few nightstops.