I was going to come in on the side of banning them all, but I really like that idea about making the uber ones BL. You can't just judge by stats alone though, you have to look at usability and traits. Let's take Pupitar for example:
PROS:
-4x FGT weakness down to 2x
-Rock resistance from 1x to .5x
-Bug weakness eliminated
-EQ now gets STAB
-Both of its types are physical, allowing for more utilization of DD (STABs)
-Rock Head (in case you like DE)
CONS:
-Water weakness from 2x to 4x
-Grass weakness from 2x to 4x
-Lower stats
-No more STAB on Crunch (Poopyboah?)
-No more Sandstream for Endure/Reversalers
-Ice weakness gained (1x to 2x)
I might be missing some, that's just what I thought of off the top of my head. Weigh these aspects as you like, but I see many useful pros to match the cons. It may not be quite as good as T-tar, but it's certainly better than the rest of the UU environment. In conclusion: Make it BL, like Warthog suggested. Same goes for Kadabra and Scyther in my book. In fact, why don't we make a list of the plausible UE pokes and have people vote on whether they should be OU, BL, or UU?