Nope. We'll see
If they think the addons are the cause of a bad server performance, I guess there addon system used is the bad one. Or the servers are.
Guess there are some trolls on the forum thread so just watch out for official ZOs answers and ignore the rest.
But disabling all addons to fix server lags etc. would be a loss of many players imo (including addon devs).
This would fix the performance for sure...