you ppls still don’t get that a Tinker centered xpac is just too expensive for them. they milking the cow at maximum efficiency. a Tinker centered xpac means a lot of engineering like stuff. full of small detailed knobs, cogwheels, lights and typical engineering stuff. way more expensive than cloning and finetuning some dragon rigs.
on the other side cheap rehashing from mechagnome patch of BfA would be possible then.
hmm, i assume dragons are just more cheap to do.