In case this helps anybody down the road with this specific model:
Well, I was advised by the dealer's service department NOT to bring it up through the new pour under the tub itself. I was a little disappointed with this answer, but we have the location so dialed in, I don't think you're really going to notice it. Also, because we have a continuous surface, we'll be able to line up the tub right next to the punch through location at delivery.
Our backup plan was to run the conduit out past the back edge of the new concrete, punch out from the ground and then run flex conduit up against the toe kick to the electrical entrance. Really glad I double-checked that, because that would have been really unsightly given the fact the corners on the Grandee come clear down to the ground.
New stamped concrete just needs it's relief cuts, an acid wash and a couple coats of sealer, which are being done this next week. Tub is scheduled for delivery in a few weeks and we can't wait!
Thanks for all the replies.