It's an issue with one of the livery files. I do know know which, but I do know, if you separate this out and load as a custom mod you did yourself (not from the Steam cloud), the A350 models work. I have a theory that it has something to do with either the A330 wing details (not usually included in A330 livery files when I compared to another working mod) OR there are some livery files in the smaller airplanes that do not have "clear" backgrounds within the image files - they are solid black backgrounds.

@Paul agreed. For those wondering, this mod seems to entirely break the flight loading process, causing flights to be stuck in a endless "en route" status on the Flight Monitor

This mod breaks the game for me. Anyone else having issues?