Love the potential of the game so far. TL;DR version of the below: The UI doesn't feel as intuitive as I'd expect compared to other games in the genre. If I've missed something obvious about the UI that helps address the following, please let me know.
I feel like the UI doesn't give me enough hints about what's going on:
1. A unit with no current move order (or order to stay put - e.g. fortify) has no obvious indicator. I'd personally go one step further and would prefer what Civ 4 does - auto-shift focus through units that need orders (including centering the camera).
I know there's 'tags' along the top left corner to see each unit, but this hasn't really given me what I'm looking for so far in terms of "who/what still needs attention THIS TURN". A option to block end of turn with a hint as to who still needs attention might go a long way (or just a hover over the end turn button...? Color/outline/something for those tags?)
2. Similarly, cities that aren't currently doing anything don't block ending turn. I realize this is less similar to Civ - particularly since you may have NO units or buildings ready due to resource constraints. I see that as the problem - there should be some sense of the city 'doing something' even when there's no overt construction. The 'build wealth/research/culture' mechanic in Civ4 always felt like a hack to me, but something along those lines might help. Short version: What SHOULD a city do when it can't currently grow, but also doesn't have the resources to build anything?
3. Units with move orders or even some version of a stay-put order should 'wake up' when they see a (potentially) hostile unit. I've lost several units because I gave them a move order through visible terrain; but hostiles crossed their path before they arrived (while my attention was elsewhere).
Similar but slightly different:
1. It's not at all clear to me which units in a tile will move (e.g. when a group picks up someone to escort). How is the whole grouping/separation stuff supposed to work? MoM used bright/dim; Civ4 uses the yellow outline. There's a similar outline in Elemental but it doesn't seem to behave the same way (and the little arrow that shows up on a selected unit is a pretty small element to target).
2. Kinda hard to scroll around when you're about to give a unit an order. If you left click, that often removes focus. The minimap is a little 'too mini' for this. Suggestion: Cursor keys scroll the camera, again a la Civ 4.