@Curiosichi: In the example game where I have made the skills, current move is actually never reduced. It is purely action point based. This explains why you are still able to use the move skill after moving once. Movement takes one action point and you have two total. You can prevent your units from activating their skills by using a check like the one you suggest. I would add this check before Parent:ActivateSkill is run, though, since you do not want to activate the skill at all if the check returns false. Also, for the move skill you will need to make sure CurrentMove is actually reduced when you move somewhere. A good place to do this is in the DecideActionForClickedTile comment box in Skill_Move, after action points are reduced. If you do this, then I think it should work as you want it. Let me know if it does not.
@Selentic: Looks fantastic! Great to see that you’ve made such amazing progress. Cannot wait to play some cel-shaded warfare. Let me know if you make a progress blog or something, as I’d love to follow your progress 