Nice that the old foundation was in good shape and there a was drive up ramp as a part of it. Make sure you have good rain direction run off from the roof away from the foundation and that drive ramp.
I would have gutters with 6' extensions away from the building.
Consider gravel and drain tile either side of the ramp and drive up to keep water moving away.
Looks very nice, you clearly have some expertise in what you are doing ... ;)