I am willing to wait until the final patch and update goes live until orbpocalypse becomes something I react towards.
However, I have seen what sudden changes to healers has done to another popular MMO that I also main, and only main, a healer.
There will be fewer healers available for dungeon finders. Very few main healers will want the hassle of healing difficult content without being frustrated by their current toolkit, especially non-Templar healers (I main a Warden Healer - back when we were considered inferior to templars).
Also, from an esthetic standpoint, shooting (Templar) shards constantly during trials is going to make for or uglier streaming.
I sincerely hope that one orb is all we need, similar to bone shield, wherein it does not pop over an individual players use of it, but everyone can synergize from it until it goes away. The orb spam we were doing before was a bit ugly during stream plays and were visual distractions.
I can queue up easily and quickly for that other mmos as an "Adventurer in need" because fewer people want to play healer since the expansion update. It's great for leveling healers, but in ESO, I would not be surprised if there were Dungeon Finders that would be difficult to find healers, or fake healers popping up just to get complete a random daily.
My hope is that these changes are altered by the time this patch goes live.