The second fact is that they're doing it on purpose from FryeJacob's blog

You could clearly see patterns in WOW Classic TBC Gold Nathria nerfs if his guild were heading for CE. After his guild was progressing M Sludgefist, we'd the radius and harm need this week. Progressing Generals? Nerfed.There are two realities in which this can occur. They really have no clue how gamers will interact with their systems and that they frankly need 6 months of failure points to come to the exact same conclusion that the playerbase came to during Alpha. The second fact is that they're doing it on purpose, they intentionally withhold QOL modifications and obvious improvements so as to artificially extend gametime and boost performance metrics without actually having to produce new content but instead just making present content take more.

The second fact is that they're doing it on purpose, they intentionally emphasise QOL modifications and noticeable improvements so as to artificially extend gametime and enhance performance metrics without actually having to produce new content but rather just making present content take more.

It's not just classes, it is everything. Can you imagine how boring it must be to buy WOW TBC Gold work on crafting? Gotta create that new healthy part with all the new peace blossom along with the brand new vial. What's it gonna look like? Oh it is a red jar with some gold shit onto it or something.