Don’t worry bro you’ll need it for your mains in 11.2 when they decide to do another 6 class reworks and completely revamp everyone’s talent trees again.
But yeah, a rotation learner, even one that is by design “sub-optimal” is so utterly necessary in WoW now that’s its sad. Most player can’t even perform at 40% efficiency with their class, Blizzard’s balancing will probably get better overall when most players are performing at least above 50% and closer towards 70% because they’ll have a much more accurate statistical basis for what’s causing issues where.