Looks like I'm in the minority here, but I didn't like Endless Legend. Disinstalled it after 11 hours.
It's not a bad game. Far from it.
It looks very pretty but, for me, it tries to do too many things. It feels like a bunch of half-finished games put together to provide an artificial feeling of depth and complexity.
It's a 4x with quests, basic RPG elements, a rudimentary city builder and very basic tactical combat.
These single parts of the game are mediocre at best. Put together, they make a mildly entertaining 4x game.
To me, the result has been a very bland and uninspired game.
Did you play before or after some of the (later) DLCs?
Those were exactly my thoughts on the base game and I was amazed at how much it had changed. All the systems were there previously, but they didn't really work together.
I thought Tempest especially added a lot, but all of them combined stopped it being bland. The other thing is the different factions, I thought some were pretty rubbish, whilst others were great fun - I can imagine trying out 2-3 factions and thinking it wasn't great just because they didn't fit your playstyle.
I still wouldn't say it's the best 4x ever, but it's certainly very entertaining now in my opinion.