Actually it would be nice if there were more advantages to having 4th ascendancy other than easier time with hegemony. I think the whole 3 ascend then horde 10 tokens to win has became the meta and it is a little too strong. a 4th starbase or a 4th fleet would help. But as mentioned there is no fleet card for that nor is there a 4th fleet token.
The end game needs work, for sure.