Brandon agrees with you. He's said in the past that he really doesn't want that to happen to WoT, though, ultimately the decision belongs to Harriet and Team Jordan.
As for what prequels I'd like to see, I definitely want to see Tam's story. I'm on the fence about The Outriggers. In either case, if Team Jordan decides that they don't want these books to see the light of day, I'll respect that.