Server restart kills my mapping

Guys, I do understand necessity of maintenance, but you just wiped me out. I've spent my best waystone on the great spot with ritual and boss buffed by big towers, when suddenly i was kicked out.

Then hour of upgrades (server and then my client) only to know that the whole thing is gone (spot modifiers are gone, waystone is gone). I'm so upset. Tomorrow I need to go to job, and next weekend is 5 days away. And you let me down like this. I'm so unlucky in this game...

If you need to close the instance, why can't you just roll back everything, keep all modifiers untouched and put map back into device?

Or you at least could have big in game notification. Early enough for anyone not to start any heavily invested content

They do and did have a notification in-game before the maintenance went out and the servers restarted..