Im kind of torn but i wuld say im going to go towards flying. It is very convenient for some things. Even in wm bcoz i remember how fun it was shooting ppl down with the netomatic during the 8.0 prepatch.
I dont think pathfinder is a problem. Its pretty straight forward. I think i got PF part1 within the first month or so on my main and on my alts ive been able to do it without even trying by now. By 8.2 i think a lot of ppl will already have it.