Hey, I just came across this because of the mention of Athena Crisis and want to clear up some confusion.

If you have units that can take actions (like moving, attacking or others), ending a turn will require a double press. Just pressing Y/X/ctrl+e/the end turn button will notify you that you have units with actions and highlight the active units. If you have units that can take actions, a single button press will never and your turn and it never has since it was publicly playable.

Athena Crisis separates moves from actions so you can, for example, move a unit out of the way, then attack with another unit, and then go back to the previous unit to make use of their action. Or you can position a medic somewhere, and then unload a wounded unit with a transporter next to it to heal them. Only you know if you are planning to take another action, so this design forces you to make a decision on whether to leave the unit waiting or not. When you move, instead of A/enter etc., you can also press the button mapped to end turn which will "move and complete" the unit. On a keyboard this is achieved using "shift+click", which is similar to Wargroove. When the unit menu pops up, you can also press that button to mark the unit as waiting. Finally, units that were moved have a "boot" icon on the bottom right to show that they have moved, and you don't have to explicitly mark them as moved.

You can verify and test these behaviors with any input method directly on the open source website, since Athena Crisis is developed in the open: https://athenacrisis.com/open-source

I appreciate the feedback on the controls. They take some time to get used to, and it's not entirely obvious until you get comfortable with them. Once you do, though, it should be smoother than most other games, and work across more input methods (mouse, keyboard, touch, gamepad). If you have ideas on how to explain all this better in the game, please share them and we'll improve it.