Alright, I finally got everything and can report that it works: Comfee Smart Cool 7000-1 now running ESPHome 
I’ve went the path of modifying the dongle Rene Klootwijk’s made to adjust it to my liking: GitHub - ezcGman/mideahvac-dongle
Features:
- It is tailored to replace the newer EU-SK105 dongles: It has the exact same size as the dongle, so it’s a 1:1 drop-in replacement
- I’ve changed a few components as I thought that just makes more sense, details to be found in the ReadMe
- Not specific to my change, but it also works with an ESP-07 which offers an external antenna!
Example ESPHome config can also be found in the repo: mideahvac-dongle/esphome/esph-comfee-7000-ac-esp12f.yaml at 734de37e9b3fd7be697a360407e9a440cd6276b8 · ezcGman/mideahvac-dongle · GitHub
Here are some pics of the board and the install, hope this will help some people from here on
