The most important factor is: fleet speed war
A player who plays at x1 speed will never play at x4. He'll put the mv forever.
Target universes :
Volans x8 x1
Yildun x8 x2
Himalia x10 x4
umbra x8 x6
This gives players a choice of speed. Ranking no longer really matters... It's pay to win.
Players from one target universe should be allowed to switch to another target universe.