Sure, that's an understandably difficult and annoying problem, but I'd imagine that that use case would be much rarer than the large versus small aircraft at a single jetway stand. Not being able to choose the door and have it set by aircraft is also probably no problem, as long as the scenery dev could force it to a door if for some reason that were necessary. Definitely speaking out of ignorance, so don't put too much weight on my input.
As an aside, I'm no developer but I have dropped some library jetways into some scenery. Outstanding work y'all. Love it.