Meh, you'll live. It was an unexpected upgrade to begin with. GCH will still be somewhat open and im sure bustling. Then you have the pool which just cant be beat. Make the best of it !
Do we know that the GCH will still be "somewhat open"? I mean we know for sure that the main entrance and the monorail station will be shut down, but that doesn't mean those are the only things under renovation there. It seems odd that what appears to be mostly a "soft goods" refurb on the Poly rooms and monorail station/entrance would take nearly a full year to complete, especially when the Poly rooms are going to be completely closed off to guests during that time, unlike typical soft goods or even more intensive refurbs. I wouldn't be shocked if they took the time to shut down most if not all of the GCH for a significant chunk of the refurb, including the Kona Cafe. I guess personally (at least until we know more specifics about the full scope of the refurb), I wouldn't want to stay at the DVC studios the Poly unless I was OK with the possibility of only having access to the pool areas and the DVC area and only a counter-service dining option (all while having to deal with the general disturbance of refurbs) while I'm there.