IIRC, outside of more than enough Tinker request threads that I have seen since TBC, there are a few, and I mean a few decent “ Tinker Mega Threads “ that actually are slightly halfway decent that try to break down separating engineering and alchemy professions and making it different from Hunter and Shaman, while advocating for the steam/diesel/gutter/space punk style tech races.
https://us.forums.blizzard.com/en/wow/t/the-complete-tinker-class/705383
I don’t promote necroing these threads, but they are good theory reads on bringing in the class. Hell, buried somewhere in the cockles of the forums I had one, something something steam siege warfare or similar been years, maybe a decade.
I cope for hope that Tinker will eventually become a reality, but not holding my breath and accepted that if it doesn’t oh well, if it does, neat. Many (not all) who tend to shoot down the idea of Tinker as a class, were ones that that shot down DH being a class requests in the past. While it is fun to day dream about, reality is being up to Blizzard if they ever will or not.