I too love Steam punk electro engineer-tinker class concept.
Problem that insane Tinker-fanbois want "Tinker with mech,blasters,nanomachines,robofactory" and given it WOW.. art style that would be huge shit-show like IRONMAN cosplay.
Just look at this idea of some ....T guy "Tinker healing spec would apply healing spray to his allies" SAY WHAT? is it cyberpunk 2077?
Adam Jensen (Deus Ex) didnt asked for this, why would i be wanting this in World of Warcraft?
"Healing spray" WC3 Alchemist skill is okay with Alchemist Class ; Tinker=/= Alchemist they are like opposite units , different classes
and i hope Tinker would not cannibalize Alchemist concept. (Love dota 2 Alchemist,Dragon Knight units and have wish to see similar classes in future).