I did a full on fresh reinstall of 2.10.2 by deleting, reseting Blender, installing, then reseting Blender. Mesh issues are no longer present.

Here is what the mesh/viewmodel looks like ingame-

https://imgur.com/Q1SQ19l

Once imported the mesh looks like this in Blender-

https://imgur.com/a/fnq9ylG

After applying the rig updates in blender and exporting it, the mesh looks like this-

https://imgur.com/kGrZXKs

I'm not asking about the hands, but I'm asking about the holes and messed up vertexes from decompiling a CoD Model and importing it. Without importing it into blender and recompiling the mesh will remain fine.

I tested this out with another model, and it looks to be worse.

https://imgur.com/XT9mj6H

This is not an issue of Crowbar's decompiling, it is an issue with the import tool in 2.10.2.