Champions Online has two in the Powerhouse; one for stationary dummies and one for hologram AI enemies. HELLO?!?! Star Trek has holodecks!! Holodecks are amazing and can make practically anything! (i.e. Moriarty in particular)
What I'm proposing, at least to start, is an "armory" where players can practice on stationary targets, and the holodeck for artificial AI enemies. Maybe even combine them just into the holodeck, and include ship battle simulations.
I just want to be able to see how my bridge officers, weapons, and abilities work in the field, before I actually get out in the field.
Not that this is a bad idea, but STO is already so lenient in its gameplay, even if you play on Elite settings that Deep Space Encounters and Cluster Explorations are testing-grounds enough. The only real issue though is the travel time between the testing ground and the bases where you can re-configure your set up.
I wouldn't hold my breath, but it'd be a nice QoL feature for sure!