I'm also getting a bit bored of doing world quests and also doing a lot of m+ every week. (Even if I have my 5 hunters to switch it up).
I will not unsubscribe, but I will probably not do any more world quests. And for m+, I'll maybe try to get the weekly chest for both my teams, and the Artifact research I will keep going. I still have one recording which needs to be edited, after that it may be a break from me posting videos.

I don't feel that there is something wrong or anything about the current content considering My team setups (well except the RNG of legendaries). I really picked 2 teams which ended up to just work for boxers. I was especially surprised that hunters obviously did not lose their pet tank or the ability to just nuke a boss before any mechanics kick in. Some m+2/3 bosses have died within 25 secs during hero which is ridiculous. The scale up of base mythic and m+ will be interesting.
I'm also looking forward to getting flying in the future, might make world quests a bit more endurable.

Anyway things as they are now have just come to the level where it's boring, and I'd rather do other things. For example I've recently started climbing/bouldering which I found surprisingly fun.