Ok, I broke Freelancer. The game crashes to desktop when I open the navmap (but everything else seems ok). Definitely a result of aforementioned modifications.
However, I haven't checked the FOV settings to see if they're the same or not.
Also, it seems the black boxing during undocking cutscenes disappears; probably also related.
Someone else commented about text size; that would be a result of the new DSAce.dll file. It has probably increased font size due to the increased screen size.
Connecting to the server seemed a tad smoother, though.
That appears to be the standout line from FLSpit when it CTD's after trying to open the navmap.
Also, while the game is in widescreen, it appears to be 'shrunk' or zoomed in on the ship. (I've only tested fighters so far.)
That's not to say that it's been stretched horizontally to fill the screen, which is what usually happens when using just -dx.
Must go test more.
Oh, and the hud was in the right place.
Gonna switch back to old DSAce and see what happens.