So after a bit of playing around with it, i find myself actually wanting to go back to XBXL or even vanilla worldgen over BoP.
Started over several times with random seeds, and after probably around 10 hours total worth of creative flying around trying to find a place to settle down and start survival mode BoP feels a little 'meh'
With a very few exceptions, the sky color changes are a deal-breaker for me in almost every biome that uses them, most look like they'd be fine on a passing through basis but having to see it nonstop for several hours unless im underground would wear thin fast. If the change was a little more subtle I probably wouldn't mind so much.
Aside from that, the actual terrain itself is in many biomes so broken up I'd spend more time terraforming than actually building. On my last restart i went through the config and disabled most of the biomes that i knew beyond the shadow of a doubt i wouldn't do anything with and/or didn't contribute some useful resource. Popped in, pointed west, and flew in a straight line with minimap fullscreened and zoomed out, and the only areas i came across that looked like they'd be nice to build on turned out to be either a tiny island or a small valley of nice terrain in the middle of an otherwise unbuildable/dont want this as a constant backdrop area. For example i had an area of decent wooded rolling hills but it was maybe four chunks worth of that surrounded by scrag, vertical-sided alps, the hellish burning biome i dont recall the name of, and sludgepit.
Dont get me wrong, most of the biomes themselves look great and there's a few nifty non-cosmetic bits here and there, but after the initial "ooh that looks cool" comes the "does this look like a place I'd want to build something?".