Yes, I've noticed the artifacts as well, don't worry.
Other than that, the game runs at a steady and very playable 60FPS at 1080p, I'm double-checking to get rid of the issue, maybe it requires some special setup on DXVK or maybe a mesa patch (already had to compile a custom driver on the console to get rendering working so that'd be expected) so it looks as intended.
But other than that you technically could play Freelancer on a Playstation 4 if you really wanted to, and if you don't mind the texture artifact issues, if people is interested in learning how I got this far I could make a dedicated thread later on.