So, with Threats of being a Tinker class being rather common and dominated by the same people, I would want to tackle the question of Tinkers with a different approach in this Thread. My question at you would be, whether or not you would want to immerse yourself into the fantasy of being this guy:
Many people who argue in favor of Tinkers do so with the arguments that a class using machines would be neat or that it would be something different and similar arguments, which may be true but in my opinion are not indicators of whether or not people would actually play the class. During my time in World of Warcraft, I often saw people argue in favor of certain concepts because they are there, while ending up not actually supporting them by playing them. A good example would be for example Pandaren, which was an often demanded race which still ended up being one of the least popular core races despite being playable by both races.
So I want to appreoach this not with the question whether or not a Tinker would be an interesting or unique idea, but with the question whether or not you would want to live out the fantasy of being the character posted at the Screenshot. People chose classes based on aesthetics, performance or class fantasy which is more often than not tied to lore characters, but in my experience when it comes to brand new classes the most common pull towards them and the strongest reason they end up being successful or not is aspect of class and character fantasy. So far in the history of World of Warcraft, the two immediately successful and popular new classes, Death Knight and Demon Hunter, played strongly off the fantasy of being an iconic Warcraft Character, in these cases Arthas the Lichking and Illidan Stormrage. The Monk was the outlayer, being based on a less popular and more niche and gimicky character in the Setting who doesn't pander towards the typical fantasies, interests and wish fulfillment of the general WoW Community, he ended up creating no hype and being received rather coldly during his release.
Which I feel like should teach the lesson that new classes shouldn't be based upon whether or not people may find the idea of it neat, but whether or not the fantasy of being the character who most strongly represents this class is appealing to them.
So is being this Gnome on the picture a fantasy you want to engage in?