This might be better located in the *A forum. However, if you want to go away from M&M anyway it is certainly worth considering to do it with your upcoming flights. You need to check the booking classes for your trips to know how many miles you will get in different FFP‘s. Since your AI flight will be credited to M&M not on a price base but rather on distance it might be the same with other FFPs in teems of milage. Your LH C flight is most likely in P which will credit nothing to a number of other *A FFPs. That leave on F leg on LH which probably earns you more on another program.

But then you have a couple of miles in a new account and thats it for the start.
I wouldn‘t go that path unless, as mentioned, you want to leave anyway.