I think the reason we haven't seen the Mechanics is because one of them got hurt like a year ago, they just did nothing with the other while his partner was out.
Dawson got hurt but I was under the impression that he formed The Mechanics after his return from injury. Scott Dawson's a great throwback wrestler - an Arn Anderson type.
The "partner" - Google can exclusively reveal - is Dash Wilder and probably looks like this:

If it means we can get Kalisto/Neville, Kalisto/Sami, Kalisto/Axel, and Kalisto/Owens matches then I'm all in for this idea.
But the outside possibility of Lucha Dragons versus Balor/Itami also makes blood rush to my man regions(but I'd more than "settle" for Kalisto/Balor and Kalisto/Itami one-on-ones too).
One can't help but wonder why they felt they needed to put Kalisto in not one but two tag teams. I suppose they gave Neville the same treatment so it's not exactly an indicator of a lack of confidence.