Mesh to MetaHuman with less human features

Gordig

I've just started experimenting with converting my Daz characters to MetaHumans, and I'm finding the MetaHuman Creator frustratingly limiting. Apart from having no apparent way to control the body shape outside of a very limited pallette of shape presets, it also doesn't seem to work with less-human features. Here's the latest character I converted to a MetaHuman:

And here is what the MetaHuman looks like:

Is there any way to hack the conversion to MetaHuman so that it maintains the pointy ears and lower tusks? Or is there something I can do after it's generated to re-introduce those features? What about editing the body in ways that the MHC doesn't permit?

As a related issue, a lot of my characters have scars and/or tattoos, and I haven't checked for myself yet, but can only assume that the conversion to MetaHuman changes the UV such that I won't be able to convert G8/.1 textures, so what are my options there?