I think you should just do what you want. If you want to keep drawing Peach in all of her lovely, natural self then go for it. And if you want to draw her in pretty, awesome dresses then go for that as well! Don't feel as if you should keep drawing more mature content because of all the perverts around, or stop because of people getting offended.
Personally I like your art either way so I don't mind, as long as you still keep doing both and hey, maybe you could even draw some of the other female Nintendo characters more often, even in the nude
With the new mature content restrictions I wouldn't have to worry about this matter anymore. If any underaged user gets around the filter to see my mature images and get offended is no longer of my concern.