There is no plans for a new party.. Trump already shot that down so all those bitching will fall in line accordingly.
Best way is with a lot like you said but clearing out the rino scum needs to be done. Once that’s done and you actually gain not only local and state governments but the house and hopefully the senate, they you can “rename your party” but only once you have power back.
Doing so before that you put yourself in a forever 3rd place or worse.