Depends. Had you had conversation with them about what species you wanted or was it totally left up in the air? When I ordered my Marchlewski, we discussed the top and back being Amboyna Burl, because I had seen an awesome bass with Amboyna Burl. He started building the body even before I had chosen the board for the top and back. And then, mid-build, I reversed the pieces designated to be the top and back, because leaving the one piece for the top would have required cutting out a figure in the wood that I wanted to preserve.
The little "alien head" would have been routed out for the pickups if it was on the top.
Point is, there was work getting done without knowing the specific details of the top and back. Now, if you hadn't even discussed whether it was maple or walnut or myrtle or whatever, that would be concerning, but not a show-stopper and not an indication that there were not working on the core and/or the neck.