Can I ask why you don't want to do the makeover? My 5 yr old princess LOVED it last September. She felt so special and loved the fairly godmother in training and the "big reveal" in the mirror (Cinderella or Snow White birds open the curtains). Then they get to take the makeup home with them and we had dress up fun for many more weeks.
I think the dresses at the BBB were different from the
Disney Store ones when we went but now that the Disney store carries the park merchandise, they might all be the same. We did the full package last year and I think I would buy the dress & accessories beforehand if we do it on our upcoming trip. It really adds up for all the accessories and stuff you can buy at the disney store or on ebay. I would rather put that extra money towards another experience/treat. The disney store dresses all hold up very well -- we have a couple. They appear to be the same quality as the BBB dress we got in December.