They look like they're spliced nicely, but it seems quite obvious who they are at first glance. You can go further than splicing if you want to. There's nothing stopping you from making Bartre's nose not as ugly, taking away Rath's ear ring, or making Neimi's eyes a little smaller. Just invest a little more time into customizing them with Photoshop, Usenti, or whatever, and they can look really nice.
I'd say that's a good start. Go from there.