Also, same thing was said for Death Knights. “It already exists in game as X” has been used to death at this point.
That’s a pretty big stretch honestly with two big counter points.
In Warcraft lore in general, Engineers have been referenced in an entirely different way to the point that in Warcraft 2 it can easily be argued that the Gnomish Inventor’s are more in line with modern WoW engineers.
In Warcraft 3 there is a specific instance of a “Class” being known as a “Tinker”, specifically “Goblin Tinker”, much like the other WC3 Heroes, Paladins, Death Knights, ect who have become WoW classes.
http://classic.battle.net/war3/neutral/goblintinker.shtml
In fact, the descriptor even points out the following!
"Goblins are known for their mechanical expertise and clever, though sometimes peculiar, inventions, and the Tinker is certainly no exception. With his Claw-Pack/Hammer-Tank combo, the Tinker’s ingenuity is undeniable. Though his parts may sometimes fail and the occasional explosion does occur, the spirit and enthusiasm of this Hero are never diminished. There truly is more to the Goblin Tinker than meets the eye! "
So starting with the first two highlighted words, it clearly makes a distinction between general engineering and tinkers as it states that Goblins in general are known for mechanical expertise. The same can be stated with the Gnomish Inventors of WCII with–
“The Inventors are highly adept at creating outlandishly clever contraptions for military use. Among the many bizarre inventions created by the Gnomes are the Flying Machines that hover high above both land and sea, as well as the implausible Submarine that can move under the seas. The Gnomes are also responsible for perfecting the technique of extracting various chemical compounds out of oil to make gunpowder and explosives. Although the Gnomes are a bit odd and eccentric, none can deny their value to the Alliance.”
Which also falls under generalized Engineering where as Tinkerer’s would have a more focused theme to them in how they operate.
I think that the statement of “It already exists with X” has been played out to death. Back in TBC when rumors of Death Knights began to pop up on the forums there were plenty of people who immediately turned and said “Can’t happen, Warlock’s have many of the abilities Death Knight’s typically have!” and even cited, specifically, Death Coil to back up their statements.
Didn’t stop Death Knights from becoming a thing.
EXACT same thing, funnily enough with the same class as reasoning, happened with Demon Hunter’s when they came out. The argument was made “Their abilities are too similar to Warlocks, wont happen!”
Well, they ended up happening.
I am not saying that we will see Tinker’s any time soon or if ever, but I think the argument that “We already have Engineers, it can’t happen” is flawed to a core.
One last example, the gnome racial leader Gelbin Mekkatorque. Most Gnomes and Goblins are Engineers by profession, but many notable Goblins and Rogues have very distinct Classes about them as well. Many are obviously Warriors, Hunter’s, Magi, ect in the way they fight. Supplemented by Engineering, yes, but they have distinctly focused styles of combat.
Mekkatorque fight’s in a completely different mannerism than most other Gnomes, preferring his rather iconic mech suit which we saw in the Gnome starting zone back as early as Cataclysm and receiving a distinctive visual overhaul in Legion. This can also be seen with enemies like Thermaplugg, Blackfuse, ect to give a few more examples.
I would close with the argument that the biggest difference between between generalized engineering vs the concept of the “Tinker” is how it’s applied and used, how it dictates a fighting style.
Once more, not saying that they are coming but the argument against them is about as thin as it was for DK’s and DH’s.