With appreciation both for the effort put in to the new overheal VFX and the need to distinguish its effects from shield, the new overheal VFX are, in my opinion, very distracting, especially to someone with visual processing issues like myself.
The effect at full overheal is very 'video gamey' in appearance, being a bright neon purple that clashes with most environments I have so far used it in, and being a marked departure from the aesthetics of other game buffs (it looks like characters are being scanned by a targeting system).
Having 3-4+ of these affects on the screen can be... overwhelming... to the point of making it difficult to focus on the environment or roleplay (even with the tab key pressed, it's hard for my brain to process much of anything beyond the four very bright neon purple swirlies around me and my allies. This is especially true in darker dungeons.)
My only suggestion is to perhaps change the max overheal color to a more natural hue like the gentle blue/white it is at medium overheal. Otherwise I am feeling dissuaded from playing my dedicated healer cleric at the moment, because the effects are just very loud for someone with difficulty processing too many stimuli at once.
Thankees.