In exchange for its improved flexibility, I'd say that it should only be castable outside of combat and/or have a range of 0m. The caster should have to inscribe it where they're standing (centered? adjacent?). This way, you either have to put your caster in danger, or you'll likely only get 1 or 2 enemies in the AoE. No casting it on a cluster of enemies that are 10 ft away from the caster.
+1, this is the best solution IF it does not break stealth (like minor illusion) so you can actually use it for combat (before attacking) and do not have to kite enemies for hundreds of meters into your traps
