I briefly considered moving to the x-pro2 from my e-pl5, but dismissed the idea. I am shooting at 24-400mm Eq focal lengths, which is served now by the 12-40PRO, 1.8/45 and 40-150PRO lenses +1.4TC. Total system weight ~1.9kg, lens cost as new: ~2500$ Camera cost: ~0 (E-PL5) to 1300$ (PEN-F preorder - not going there, just put here the most expensive μ4/3 option)
Fuji alternative would be: 2.8/16-55, 2.8/50-140, 2.4/60 Total system weight ~2.3kg, lens cost as new: ~3300$, camera cost: 1800$ (x-pro2, earlier versions wouldn't justify the change for me).
Is the fuji (namely x-pro2) +the above lenses better? Probably. However this advantage has to be paid by heavy $$$ (~2k$!) and around half kg extra weight. Even then, my target telephoto range is not met, the fuji lens tops at 210mm eq, whereas the oly at 300m eq, without TC, that's a lot to crop... Alternative of course would be to get the new 100-400, but that's even more expensive than the 50-140 and looses 1EV compared to the oly 40-150+TC.
Briefly put: that
~1EV doesn't worth me ~2k+$ and 500g over my existing setup. This 1EV can easily be compensated by the superior IBIS of e.g an e-m5ii body or a very fast lens, such as the rumored f1.2's.