What is OP. If (in multiplayer) you build an "unstoppable" 2 turns after your opponent finishes his/her VC, you have lost. So much for OP. Now if your opponent has finished his VW, but has not finished the counter/settling/conquest, it becomes a race. Late game units need to be OP, and Zeno Titan and the Golem tend to be at T2. Does anyone use LEV Destroyers? Should it be enhanced?
Gaia came out with several nice to have units that have affinity requirements so strong that you finish a VC long before you can build them. Could someone lower their affinity to 13 in one affinity. Since she has three, you could have 1 for each affinity.
Also the Battlestar Glactica is a nice starting point for an upgrade of the orbital level. I could see a different type unit for each affinity. One would carry aircraft that could attack orbital units. Another would have a long range laser that would have a strength of 10-15, but plus 3-400% (i.e. 30-60) against orbital units. The only orbital units with any defense would be the high affinity units. The third would have a phasel transporter like the awesome rocktopus. These units would be able to move while in orbit as long as they did not occupy the area of any orbital unit.