Well, RINOs won't be a problem once the castle is cleaned out.

Or at least much less of one. Considering most of the RINOs have committed one crime or another, that's a reason to take 'em out for good when the hammer comes down publicly. Whatever RINOs are left will likely be few, low-level, fractured, or incapable of doing much on their own.

Plus, if the RINOs' goal is controlled opposition, what stops them from joining & taking over the new party?

Only way is to take them all out.

Assuming that's the plan & the plan pans out. Because that's what we're all here for, right?