As a druid player since Cataclysm, I tanked mostly heroic dungeons and really enjoyed doing them. The abilities such as Challenging Roar, Demoralizing Roar, Savage Defense, baseline slow, baseline stun these things made the class FUN for me.
Granted, as a military member, I didn’t play much. My only experience raiding in Cataclysm was tanking the first two bosses in BWD. Prior to HFC, I never actually raided hardcore. Yet, I began to like it.
The part about Guardian Druid for me was the feel of the class.
When I started to raid Mythic in Legion (pretty much after the 1st Tier due to military deployments) I didn’t know Guardian druids were OP at the time, yet the Artifact weapon essentially filled in the pruning that was done at the start of Legion (removing baseline spells, baking in passives, etc.)
However, at the start of BFA, I noticed that Guardian Druid was immediately lacking, my guild knew it; being a server first guild, wanted me to switch classes. I told them I didn’t have any tank ready for Uldir opening, thus to be apart of the raid team and to contribute I had to change to a dps spec.
Now my guild could’ve worked with me playing Guardian druid, but if we wanted to progress into Mythic it was a liability, one that a BDK or BrM could easily circumvent.
I doubt Blizzard will go back to how Guardians use to be; having Warrior-type roars, a niche playstyle, and passives that improve our abilities.
Yet, I look everyday on the forums and read each comment about Guardian druids and it hurts my Ursoc-soul because as someone who was testing in the Beta for BFA I remember the frustration of not getting responses, feeling ignored.