Something very hard about giving the player perfect information about how a turn will play out is that enemies can go before you in their turn order. This has caused a lot of confusion for testers because you might need to target an ability where an enemy is going to be rather than where they are.

My new idea for communicating this is that if your ability is going to affect an enemy at a position other than where they begin the turn, it shows a ghost sliding into where your ability will affect them.