There's a bit of a confusion between the various proposals and CTV itself. Its job is to be a TXID lock and there's not a large design space for that. None of them are competitors to CTV. In fact, CTV has no competitors at all. It's constrained to a primitive and nothing can be added or removed. Jeremy had been working on a few proposals but dropped them in favor of CTV.

Post CTV and we have basic covenants in the market, we can better determine whether we wish for OP_VAULT or OP_CCV (matt). We'll also be able to better analyze whether we want TXHASH or TEMPLATE KEY. In both cases, it would best to have a primitive that acts as a keystone for all future upgrades.