I've made some pretty substantial changes to the alpha sheets behind the scenes, and to the Pathfinder [Legacy] sheet in particular. Please try clearing your browser cache, or post in the Experimental Features forum if there are any issues!
At this point, we highly recommend that all new Pathfinder sheets be created in the alpha and that existing Pathfinder sheets be copied into it via the 'Copy to Sheets Alpha' link in your regular sheet list
Could be. Of course, if they found a way to extend standard progression to level 30 without breaking the game, I'd be pretty much astonished. I wouldn't bet on Epic Spellcasting being in though. At least not without huge changes.