It wasn't once per round. It was once on each character's turn. It takes a move on each turn to accomplish.
The updated version posted is not any different.
What I wrote is correct: it can only affect a target once per round. But since you missed the meaning I will be more explicit: it can only affect each target once per round. Sorry for the confusion.
I know how the pre-errata abuse worked. The updated version is the same and to me that is part of the issue, which is why I said I don't think it is a good fix. Now, you can affect up to six creatures in one round if they all move through the space on their turn. Six creatures each getting 1d6 is not a big help IMO, but YMMV.
Prayer of healing is a cleric spell. Healing spirit is a druid spell. Neither typically has option to save the slot for one or the other.
Valid point! I was thinking of it just because we have both classes in our party. So, instead of the druid using healing spirit, the cleric can cast prayer of healing.
Compared to aura of vitality or mass healing word it was. Mass healing word of d4+mod to up to 6 targets is worse than move to heal repeatedly. Aura of vitality is once like you suggest.
Ok, with a +5 mod, mass healing word affects 6 targets for 7.5 healing each.
Healing spirit can affect 6 targets for 3.5 each each (now). It was OP RAW before (I am
not arguing that).
Also, even during a single round, the cleric's concentration on healing spirit could be broken before each PC has a chance to benefit from it. Mass healing word also has a greater range.
With the current fix, I would remove the concentration aspect, and make it one action casting time. Most people seem to be implying (from what I have read and understood anyway), that the 2-6 uses will be used within the round it was cast or the next.
Healing spirit was better in-combat and out-of-combat spells of the same and higher level spells. What was posted is much more in line with a 2nd level spell.
It might just be an april fool's joke but it's a much better implementation either way. It's still worrhwhile to prep over mass healing word because it's similar healing and similar number of targets in the same slot.
I agree the "fix" is more in line with a 2nd-level spell, but overall IMO it is not a good one. We will continue to use it as we house-ruled it: one target (only) per round, for up to 10 rounds. It has worked very well for us in combat and out and feels balanced.