Dumb question -- if it is dedicated crewing, what if you are not nuts about the co-workers you will be spending a good bit of the next 5 years with. Almost like being, married to them?? Also, based upon the NTSB report I read on the BED G-IV incident, I would weigh the "safety gain" of a dedicated crew against the "safety risk" of a complacent team working together for too long. Pros and cons to both.
At the end of the day it came down to a few factors to move back - (1) Recovery times and peak day flights -- big problems for FLOPs and got worse after getting FX (and according to my friends on FX still an issue) - we were moved 3 hours on practically every peak day and waited many, many hours for recovery flights when needed, (2) care of the asset - the brand new Phenoms were looking like crap after less than 1 year -- FLOPS just doesn't keep them up as nicely as NJ and, I know it was only appearances, but made me wonder about the stuff I could not see, and (3) how they treat the pilots (not because I am such a nice guy - which I am - but I believe better hotels mean better sleep - better sleep means hopefully a safer flight). In some locales I knew where NJ put up the pilots for the night and the FLOPs pilots were nt put up in the same (or even similar hotels).