Hey WGH, sorry to read of the latest saga with your Jetmax. What I'd advise is one of two things in terms of where you are at with the Jetmax and the dealer;
1. return the scoot to the dealer with your list of issues to see how or if they are able to resolve them. At a minimum have the dealer replace the oil pressure switch (which they have offered to do) and ask them to at least check cylinder compression since you feel that there is a difference in engine perfromance.
2. go for the buy-back option either as a complete cash buy back so you can get out of the Jetmax and then buy something else (AN400, AN650 or others), or,
3. Jetmax used as a deposit on another CFmoto product, but I'd be going with the 650TR touring bike and not the 650NK, even if that means waiting or pushing the dealer for the m to import the TR...

If you have no joy from your CFmoto dealer then let me know...
BD