I don't personally know what the issues are relating to using the new targeting to heal since I haven't tried that yet. I DO know that, while this is somewhat better than the old system for attackers, I STILL somehow end up targeting an enemy I'm not even facing way far away from me, OR somehow automatically selecting someone who heals or casts a spell on me (even when set to targeting enemies only). And I'm not even sure why.

So, better, but not by much. In a way it even pronounces the flaws in trying to do battle.