I can answer your question. I came from the GNex to the Maxx, which is the same software as the X. I also used SVTP for a hotspot on my GNex. I am also on Verizon with unlimited data. I can tell you with certainty that the SVTP hotspot (or any other hotspot app, I tried FoxFi also) will not work on the new Moto phones. I am hoping that this is temporary and a work around will be found.
Right now my only option is to activate Verizon's Mobile Hotspot app at $30.00 a month. Now in my case I don't use the hotspot too often so I could add it, use it for a few days (like on vacation) and then cancel it and only be charged a prorated amount, about $1.00 per day. But if you use your hotspot a lot then it is going to cost you a LOT.
Let hope all of the new Moto phones get root so we can get around this problem.