Rotor
Survivor
Our perception of how well the skill system fits into the gameplay loop will likely change once the end-game content is added.
If there were more to do, we might feel inspired to extend our game, which would allow us to see more of the skill tree.
I think it would be a mistake to spend more time tweaking skills at this point. Progression should be balanced around the finished product, otherwise we would be guessing as to how it would feel in the final game.
Not only that, in my noob opinion, as a new player I am not even close to getting anywhere.
For you guys that have been playing for Eons and get to invincible in 3 weeks, I see how it would seem meh.
For me, I am cool the way it, maybe 1000 hours from I will feel different, although some of the gating is weird.