Good work, Margie.
It's going to be interesting to see how things work out going forward. I know he worked with several people coming up with that list and they did find some regional differences.
Breeders have been working hard to breed more disease resistant roses. I am so glad many of the chemicals that were once used so freely have been banned. It forced breeders to breed for good plants and not just for pretty blooms. I think that is a big deal !
Your contacting P. K. is also a big deal. Having encouragement coming from the "average home gardener" and not just the large rose gardens is a way to validate his work in a different way. That counts a lot !