I originally left the Avatar off the list (among others) because I believed there were significant barriers to its faithful implementation given Starfarer's current state.
But returning to think about specifically that ship, I think I could come up with a reasonable implementation for every part of it except the tractor beam and the individual destruction of the satellites. The satellites themselves I think would work best as a single turret with three barrels, each facing outward but with a 360 degree arc, and point-defense range. The main ship laser of course would be a beam weapon.
The tractor beam, unfortunately, has no analogue. But I think I could make the ship fun to play anyway, when it comes up.
After the next ship or two I'll revisit each of the ships from UQM, edit the options a bit and reset the poll votes.