Every corvette and fighter in the game will end up being pilotable, and when the time comes, we'll need help with balancing!
As of right now, most of the Taiidan fleet is converted but do not have table entries. But here's a list of flyable ships that you'll be able to use in either singleplayer or in a multiplayer TvT!
Kushan:Scout (or if you're a purist, Light Interceptor)
Interceptor
Attack Bomber
Cloaked Fighter (cloaking in single-player or co-op missions only)
Light Defender
Heavy Defender
Light Corvette
Heavy Corvette
Multigun Corvette
Minelayer Corvette (although I can't imagine why you would want to)
Bomber Corvette (original design)
TaiidanScout
Interceptor
Elite Interceptor (original design)
Attack Bomber
Light Defender
Heavy Defender
Light Corvette
Heavy Corvette
Multigun Corvette
Minelayer Corvette
Bomber Corvette (original design)
Turanic RaidersInterceptor
Bomber (original design)
Standard Corvette
Missile Corvette
KadeshAdvanced Swarmer
This list may end up changing as new designs are thought up, since you'll primarily be flying Kushan craft and fighting the Taiidan, but there will be a few missions where you'll be able to pilot the other craft as well