So they released the Alpha v1.1.6 of Arena Commander/Hangar Module. Apart from the usual first “why isn’t this thing working” moments it loads faster than the previous Versions. And thanks to @BoredGamerUK a little tweak manages to give my old pc “the edge”.
It’s still not pretty but with almost constant 30 fps more playable than before. I just finished a 45 Minute Coop Vanduul Swarm and I was the last one to be killed. Yeah me! ;) Here is the video with some explanations of the user.cfg