Rob, thanks for your helpful note.
Yes, I agree, the problem is not MH specifically. It's the immaturity of the 3D industry as a whole, particularly the failure to create reliable data transfer standards. If the problem was just MH, that could be easily solved by jumping to another application.
As best I can tell, few members here are animating their MH characters. If that's true (corrections welcomed), then that tells us that most MH users have arrived at the same conclusion I'm coming to, animating MH characters is possible, but not worth the bother.
That would be fine if there was some other use which MH characters can be put to, but so far I don't see what that is. Well, ok, many users seem entertained by rendering their MH characters in to static 2d images. There's nothing wrong with that, and fun is good. But for myself, if I'm going to work in 2d I'd rather stick to high quality photos.
The most interesting and accessible use of MH characters I can come up with at the moment is to make them speak with the program CrazyTalk (available for Mac and Windows, base price $30, if I remember correctly). This is a kind of compromise, because you can only animate the head of your character, but you can do so in a way that is easy and cheap. Hey, if I'm not complaining about the interface you know it must be pretty easy.
So far I've detected little interest in CrazyTalk here and on other 3D forums, so I'm not clear how acceptable of a compromise this would be for most 3d users. If anyone is interested in exploring, they might try checking out the CrazyTalk tutorial videos on YouTube, which I found to be very well done.
In short, for the time being at least, it appears CrazyTalk will be where I use my MH characters. If anyone should wish to discuss that, happy to oblige.