This issue drove me crazy, so I loosened the FD cable to reset everything, and lo and behold, I found out that the cable didn't move freely at all through its housing at the bottom bracket. This explained the poor shifting performance and setup.

I cleaned and greased the cable and everything improved quite some, even though there was still some resistance in the cable movement.

Any input on how to improve on this?

Cables are Nokon, Gruppo is Shimano DA7900, frame is a Dogma.

Thanks.