I understand many people are upset over the recently announced changes but ESO has never been and will never be a WoW or FFXIV-type experience because of the amount of freedom we're granted. Your meta build that you dumped umpteen hours into will NEVER be safe unless they just stop changing things period.
Content, skills (weapons, armor, etc), classes, gear.....none of these things are controlled in a game like ESO. The whole idea is to give you a toolbox and expect you to figure it out (with some slight nudges one way or another).
Shake-ups like this are the price you pay in a game that does not force you into one weapon type, one class, one guild, one role.
When any class can equip any weapon, any armor type, and use skills from any guild, on top of possibly being a vamp or ww.....nothing is safe. This is to say nothing of all the champion points and the possibilities they bring with them.
If you are looking for a game where everything is so tightly tuned that you will never have to worry about the meta shifting, I would truly suggest looking elsewhere. Not even out of spite, just the reality of the situation.
I realize this is a major shake-up and not just a small tweak but you can have variety or you can have perfectly tuned content where you never have to think about having to adjust....never will the two become one.