As the owner of a pair of shoes and a messenger bag made in pigskin (it must be Nr 2, the stiff stuff) it is not a leather I would chose again for anything that has curves. I adore pigskin and I think it makes a wonderful material for suit-cases or boxes, but I believe (now) it should be reserved for items with right-angled corners.
I don't know the "Nr 1" pigskin (which seems to have more 'drape'), it might be better material for a pair of shoes. That French (fine) grain looks very nice and it might be my first choice. Be a pest, ask them to produce a sample with the leather of your choice being lasted over a toe. In some embossed leathers the texture pulls out extremely (leaving a virtually smooth toe) while other leathers keep their texture much better.
Another thing, you might want to re-visit the design. Unless your last is severely undercut along the instep (which I would't know) it might be an idea not to let the lacing sections meet edge to edge. I am a firm believer in a gap on a Derby 'Navvy-cut' at JL (London).
Here are my specifications (this type of drawing is called a 'standard') for a (Longwing) Derby which I had recently made. Note how it is specified for the edges not to meet (with more space on the bottom).

Here is the finished upper, reflecting these specifications.

The shoes are ready now, but I haven't taken any pictures yet. I'm getting the trees commissioned next week. Once the trees are ready, I will take some photographs.)
Hope that helps.