I gave it a solid chance, even had some positive opinions about it post-launch for a bit. But I made clear that I was worried about how it'd settle after a patch or two, and we've now reached that point.
In endgame PVE and PVP where combat balance actually matters, I firmly believe subclassing has done irreparable damage to the playerbase. The unfettered power brought by this system has just completely ruined any remaining semblance of balance, and has created the most watered down homogenized combat experience I've ever had on ESO.
It is really sad to see, because the game use to be so diverse with all it's different classes and specs, with people running a wide variety of things and doing well. This just doesn't exist in a post subclassing world - when it comes to endgame PVP and PVE, you are now losing an unacceptable amount of power to take suboptimal skill line choices.
I know a lot of the casual players enjoy subclassing, and I am happy for them. Truly. But the sentiment I am seeing from the majority of veteran players is that they are unhappy with where subclassing has landed us - and based on the fact that there has been nearly ZERO balancing since it's introduction, it seems very unlikely that the studio has any intentions of trying to make changes to earn those players back.
Maybe this is just the culmination of years worth of pushing against the endgame community's desires, and the game just isn't being made for us anymore.