I say keep it at least until u have had the xp1 setup for about a couple of months, then decide.
I recently picked up a gx7. I have paired it w/ my pany 20 and the 12-32 kit zoom.. The af speed is a tad faster.. Overall iq is pretty close to Fuji, but once u go past iso 1600, the Fuji is the clear winner.
Anyway, not sure, but gf2 could be a bit faster then the xp1 as well. For the times u need a bit more af speed maybe?
Gary