Almost all these problems can be resolved by creating a sub-race for Half-Orcs, and giving them a human body. The Work for heads has already been done years ago by the mod I link below.
I've created 3 different Orcs on this server, getting up to around level 14 with one. They models suffer extremely bad animation problems, where their fingers just 'break' holding weapons. There's a ton of perks opening up this body type and allowing to so many of the existing assets to be carried over from humans to them.
The biggest perk, is people might actually play them. It's odd we have so many planetouched around and almost no Orcs, and I think we know the reason is the models, not the lore.
https://neverwintervault.org/project/nw ... reed-heads

