re: Does adding OU and Texas to the SEC persuade the moving of the SEC baseball Tournament?

I don't think the Superdome can accommodate baseball any more, not after its post-Katrina renovations.
It wasn't that good of a baseball facility anyway when it did try to host baseball in the '70s and '80s.

Zephyr Field has been pretty much dormant since the minor league team left, so it would probably take some serious cash to get it back in running order.