It was widely known long before the patch notes were ever released that sustain was going to be hit in a big way for Morrowind. I think this is fair. As ZOS has said, resource management is meant to be one of the core gameplay mechanics of ESO. Again, I think resource management creates interesting and engaging gameplay, especially when skill cooldowns are nonexistent. Now, I think ZOS has been quite heavy-handed in their approach to nerfing sustain in the 3.0.0 patch, but it is still just PTS, so hopefully some of the nerfs will be reversed. One of the major issues, as previously noted by others, is that sustain works very differently in CP PvP, No CP PvP, and PvE. Attempting to balance all three of these environments with the exact same systems seems doomed to create imbalance in one or more of them. I understand that ZOS wants a seemless player experience between PvP and PvE, but that's already not the case. Many of the core skills used in PvE are virtually useless in PvP, and many skills useful in CP PvP are far less so in No CP PvP.

But I digress. I think the main issue is that ZOS took so much away without giving anything significant back. It's like the concept of a compliment sandwich. If you say critique, compliment, critique, the critiques don't seem as pointed. There were various features that leading ZOS developers mentioned wanting to change several months ago that would have served to curb the frustration everyone is feeling at the massive nerfs. Two I was specifically looking forward to:

1.) Making two-handed weapons count as two items towards set bonuses.

2.) Addressing the RNG-based loot system, which was described as a "pain point" but some of the leading developers.

There were many other people talking about weapon dying or a gear transmogrification system.

Whenever ZOS wants to swing the nerf hammer with such force in the future, maybe they should give us a little something in return.