You're welcome! I ended up getting my stash tab last night as well. I don't know how I'm going to fit everything together when the season ends, right now I have six tabs of seasonal stuff and two empty non-seasonal tabs. Granted, a lot of the int gear I acquired for my WD will be redundant with the Wizard gear I already have, and I'm sure I'll end up salvaging a lot of duplicate pieces- but you basically need a stash tab for the set items from each class you've gotten to max level. I seem to do 2 classes per season so far, so this coming season I'll probably do a Barb and a DH and then work on mastering all the set dungeons.
Protip: While you're fiddling around with your stash trying to pare down, dismiss your follower so they stop complaining about how boring you are.
Edit: Once I got the 4 minute TX rift out of the way, it turns out I still hadn't killed Diablo on TX. I thought I beat the fight in plenty of time but didn't get the notification I had done so, and briefly panicked.