The way I see it, we are in a corner here: blizzard doesent offer us a choice. You pay them for the game (you buy the CD key, that is pretty much everywhere equiling buying a game, but not to the blizzard overlords) and they provide no service.
Playing on private servers doesent make blizzard lose money. I play on retail and private, and the only reason i shift to private servers is b/c I find wotlk to be a better game than the abomination it has become (blizzard=burning legion confirmed). People that cant afford to play on blizzard (if you live on the balkans, you know it) arent actually riping blizzard off of their $$$. In fact, me and a lot of people were introduced to wow by people that played on private servers.
So what do we have next? We have a team that is giving us a server, a service that blizzard refuses to give.
Is it theft? Yes. But by the law of supply-demand, blizzard should give us something. They dont.
Do they have the right to sue Nostralius? Yes, but that is such a dick thing to do. Most old school games are up there for free these days, and even if they are not- there is still someone somewhere that provides servers and additional services.
It is obvious that blizzard is a corporation that cares only about $$$ these days, but even then, I cant justify their ruination of someones fun when they clearly have no profit there, apart from destroying the community- the same one that probably spends their money on SC,Diablo and HS.
Can blizzard run vanilla servers? Yes, no doubt.
Most thing that they claimed to be hard/impossible/drain too much resources I have found to be implemented on private servers. Some of this thing later became "awesome new features in later expansions" lol.
In the end, I understand that blizzard is a corporation. But even then, they win nothing with this but riping their own fandom apart.