I've been doing my own playtesting. These are items I want to work on, delaying a release.
-- X FRDs? Could be added in now. Would be neat.
-- Enhanced Class MEDIUM_CRUISER to be used for HEAVY_WAR_CRUISER (movecost 0.75) position.
-- some races, like Fed, actually call it the medium cruiser so it's accurate enough
-- Make ?-PE planets R(estricted) except for pirates and Federation.
-- seriously, Earth appears everywhere on the D2's HomeWorld assault. Fix!
There might be more as I find them.