I have a couple answers that I can give you...on another thread Auctiva Jeff said that the annoying constant signing in was a bug and will be fixed (and yeah, my patience is wearing REAL thin with that one)
You CAN use immediate payment on your Buy it Nows...you can find it in the Checkout section, (maximize it) there's a box to check under the big Paypal logo. It says 'Require Immediate Payment'.
As for the spell check, yep that's gone
But 2 outta 3 ain't bad