I also like Honey Dijon very much, but I didn't like it until I saw it "in the flesh." It never appealed to me in the original photos of the newly introduced rose because they didn't show the warmer peachy tones the blooms often display. The marketers seemed to be concentrating only on the rose's resemblance to Dijon mustard. As soon as I saw it, though, I had to have it because I love russet tan roses.
I also agree about the potentially polarizing effects of Ketchup and Mustard's coloring. The colors are so vibrant that they can look garish in contrast to the usually more muted and calmer colors of most roses. I'm a big fan of vibrant colors, however. In fact, this is my favorite time of year in the shady parts of my garden because I have hanging baskets of vibrantly colored tuberous begonias in the shade. Nothing lights up the darkness the way a Begonia can.
I fear, though, that Ketchup and Mustard won't be around for long in commerce. It really is a ratty rose bush. I've bought it three times. One died almost immediately. Another is still alive, but quite small in comparison with other floribundas of the same age. The third looks great, but it's actually two rose bushes that were planted together in a container when I bought it. I didn't separate the two when I planted the rose in the ground.