Compton is on the roadmap and I’ve even had a failed attempt at adding it to MATE Tweak. Compton is not a window manager, it is just a compositor, therefore integrating into MATE Tweak requires some thought because Compton needs to run alongside Marco, but not the other window managers such as Compiz.
I’ve looked at the Linux Mint implementation and, in my opinion, is not intuitive. So, I need to drink some more tea and have a good think…