Yes that deraiuller mount really sucks. Its too far forward. All of you guys are able to mount your FDs farther back and behind the seat tube, with a good angle.
Ill attach some of the pics Ive found of yours and mounts people have used correctly.

If there is anyway I can get some measurements from you guys on the FD mount, I can make a custom one from titanium and provide it back to the community once its milled.

My litepro is coming in one month from aliexpress, but until then I could work on designs for a Brompton specific one.. if you guys can help me draw it up.