I am not sure if anyone has mentioned this already. I was thinking we should allow VR Starbase phase jump and keep research at lvl 5. However, VR starbase can only jump into your own (plus allied) planet/gravity well. You can still SB rush by building a SB in the enemy gravity well, but you can't build a SB in your own gravity well and then jump to the enemy planet.
Or it can jump into enemy planet but it is disabled when the destination is not your own or allied planet. SB rush is still viable by building one in the enemy gravity well directly.
So the ability will remain valuable defensively without being overpowered.
In term of current multiplayer gameplay, player can just play without VR. I played '5s no VR' games today. I think it is fairly balanced.