you could probably renovate that 2d deck / mezzanine to put in boxes and the like. Also the areas under the overhangs on the first level. I'd think an nice spruce up could drop the capacity down to about 38,000 - 41,000, which is where Nats Park and other current stadiums come in.
Asking Baltimore to subsidize the removal of seats to create more suites seems pretty politically untenable to me
