Button gives you killer instinct across the whole map, but it also gives you an element of stealth by making your TR so big that survivors don't know where you are coming from but it also allows you to destroy pallets when you vault over them

Ya, but the Button is just a single add-on that kinda does the same thing (but better) and doesn't require the Survivors to control the timing of it. Your method uses an add-on and perk slot. It's a nice interaction, don't get me wrong, but if you weren't going to run Tinkerers to use without FF, it's probably not worth running just for a kinda-neat interaction with fringe benefits.