Totally; i'm really concerned and upset about Rosalina's current portrayal in the games she is appearing now , completely ditching her origins in any kind of way while sounding wacky instead of like a Goddess.
How dissapointing , but Alas!
As for Peach , is quite understandable why some people don't like her (her portrayal) ; But i'd rather have an Iconic female character that would never be ditched or changed for the worst than a character that started out GREAT and it's getting uninteresting by each appearence she makes just to become Mainstream.
Rosalina is only OUTSTANDING in Mario Galaxy and Mario Kart Wii ; The rest is messed up as her base character has been back and forth ever since she got a totally 180° in the voice department.
Meanwhile Princess Peach stays faithful to her character while , in many many many appearences , many sides of her are explored adding more to her already established CHARACTER without changing it.
Rosalina was too , until Mario Kart 7 , she started going downhill ever since and just appears because she is believed to be popular , but NOT really because she added something ICONIC or anything to the Mario Series.
other characters such as Luigi , Princess Peach , Yoshi etc... instead , are MANDATORY to appear regularly 100% as they are critical in any kind of plot , adventure , side-story , etc...
In 90% of the Mario games , your purpose relies on PEACH because you need to save her , so basically If Peach isn't there then THERES NO GAME , THE END.
Meanwhile , in Mario Galaxy , ANY OTHER character could easily take Rosalina's spot as the Major NPC , starting with the fact that Rosalina's Storybook was completely optional and Miyamoto didn't even thought about giving her such a Background and ending with the fact that Rosalina doesn't really do much during the course of the game.
Not To Mention SPP will forever and even stay , and even if silly little people see it as ''sexist'' is still a Mario-adventure game ala Super Mario Bros. , unique in gimmicks and story so that's that.
Nothing against Rosalina , but this is a reminder of WHO IS WHO , and WHO is 100% Important to the Series as a Whole and WHO ISN'T.
Peach is , Rosalina isn't.