It's not a bad idea, but...

1. Lastucase doesn't sell such case without holes for camera, so it would have to be a custom-made case.
2. Paying additional 25EUR + shipping for the TOHKBD to look like it was originally announced on the Kickstarter campaign doesn't sound like a good deal.

Anyways, the reason why I liked the wooden back on TOHKBD was that I was previously thinking about buying a Lastucase plate and this meant I don't have to. In my opinion, the wooden back was bringing a 'clean look' to the keyboard - without the clean look, I don't really care for Lastucase anymore.
IMHO:
Original look > No wooden back at all > Wooden back with cut-outs

PS: I know it's early to say that it's ugly - it can look good (and I'm looking forward to some renders), but I just can't imagine it right now.