Well it's official, from the mouth of Jeremy Crawford's Twitter account. As of April and the newest printing of Xanathar's guide the nerf everyone was waiting for has come. You can read more about the changes here: https://www.thegamer.com/dungeons-dragons-xanathars-5e-errata-eliminate-nerf-healing-spirit-conga-line/
Here is the official Errata: https://media.wizards.com/2020/dnd/downloads/XGtE-Errata.pdf
It basically can only be used 1 + Spell modifier times (Minimum 2). ZAP!
-D