if the animations wouldn't be perfect I think pretty much anything looking at least a bit like a passenger would be better than nothing until we have the sims and tools required to model it in a better way.
Which, for us, would mean working twice: once to create the imperfect animation, and a second time to remade from scratch.
Just look at the wingman in currect GSX for example or the catering and baggage guys. To me they look very good already in current versions of our simulators.
That's not the issue. The issue is, the modern human animation tools/libraries we can use today, they all assume better skeleton models than FSX allows.
But it's not just an issue of "just" making the animations. To move a crowd of people, you need a crowd simulation too. Yes, of course we can do that, but there's no way you can move so many people, all at once, with the limited memory we have in FSX.
No, we don't want to add another thing that might crash the sim, so users would then start to thinking it was the CAUSE of their crashes, due to the other stuff they loaded the sim with.