It looks like the major changes are still just the possibility of getting the new homepage layout and series sort option?
If that's really it, I won't be updating. And if that new homepage ever becomes the only option, I may never be updating again
(yes, I hate it). Since I prefer to do all my purchasing through my PC only and sideload all my books, I never sync so it will be easy enough to avoid. I add the series number into the title through Calibre when I transfer my books to the reader, so series sort isn't something I need either.