Endless Space is ok, not too great. I got a solid 15 hours in the game before I got bored. Its a nice game but lacks the character that Endless Legend does. Also battles are tedious, much more so than Endless Legend since battles are capped at 12 ships per side and you can have stacked units of a hundred units at a time, now imagine fighting each battle over and over, 12 units at a time.
How is AOW3? Looks interesting.