Norma, I'm in the process of developing a buffalo chicken pizza for myself, so I've been mulling this topic over in my mind quite a bit during the last few days.
It sounds like you and your daughter are extremely pleased with your results, but if you were open to a little more tweaking, I have an idea or two.
I think a bit part of the buffalo chicken experience is a warm, spicy wing with cold tangy dressing. Also, when you cook creamy dressing it basically just separates into it's primary ingredient- oil. I like pretty rich pizzas, but between the butter in sauce and the milkfat in the cheese, the extra oiliness from the cooked dressing might be overkill. You might want to think about dressing the pie when you sell it. Have two ketchup bottles- one with ranch and one with blue cheese and ask the customer what they want. With a little practice, you can probably do a pretty design in a few seconds.
That should allow you to ease off on a bit of the oiliness and give your customers that warm chicken + cool dressing experience. It would also make the blue cheese optional, something that could appeal to more customers. I've never seen any numbers on this, but I think there's a good number of people out there that just don't like blue cheese. Another thing to consider is that warmth magnifies flavors, so, even for people that like chilled blue cheese dressing, warm blue cheese in a pizza might be a little too intense.
You know your customers. If you think you have some blue cheese loving customers that you know are going to love this, then, by all means do what you're doing. But if you want to cast the widest net possible, I'd make the blue cheese optional.