I wouldn't be afraid to use the original hop schedule. Although Nelson is a high alpha acid hop it is low in cohumelone so shouldn't be harsh and is a good hop in a Saison. Also, you originally had almost 90% of your hops added in the last 15 minutes which is going to add aroma more than bitterness and aroma fades with time anyway. You also have a 1/2 pound of aromatic which I think would add some maltiness to stand up to the hops. Just my two cents.