Soothing Mist Visual Change?

[Alfimeh]

Ok so this is going to sound weird, but I remember back in MoP Beta that Soothing Mist had three green "swirls" that went along with it. However, one day after logging into the Beta I noticed the swirls were gone for the most part and only showed up sporadically. I've tried to pinpoint when exactly the "swirls" come into play and I can't exactly figure out of they're only appearing when it actually heals the target or if it is truly random.

The reason I bring this up is because I also noticed that when the Jade Serpent Statue uses its version of Soothing Mist, it always has the three "swirls" regardless of if it's actually healing or just over-healing.

I wonder if this was intentionally changed and what the 'reasoning' for such change would be. Thoughts?
(Yes I know MoP has been out for over a year, I just thought to bring it up now.)

TL;DR - I miss my green swirls and want them back, right meow. :c

[Geodew]

Seems they show up when you start a cast (but not from spamming).

[Artenesse]

I must check this out at once...have never noticed that before...

[Avada Kedavra]

Seems they show up when you start a cast (but not from spamming).

This covers it nicely. Should never cast soothing mist, only spam it.