I'm in the same boat, and need the hotspot more than I need the blinkfeed, although I did get used to the blinkfeed. It will take some time to get used to the go launcher. My problem is that I can no longer use the "gallery" to view pics. Any ideas on what to do? I get the same error message with the black and grey box stating that this app is not compatible with my device.
I just use Google's Photos app (rainbow colored pinwheel icon) instead, but it is an annoying work around.