I would tell Victoria, that she should "wear" her hair open, and much more seldom a ponytail. It would be nice to see her with darker, shorter (about 10-15 cm or 4-6 inch) and more stepped (right word?) hair. She had such a style in 1997/1998. I guess she had it then shorter, because of her health problems, but if she would try it again (and now WITHOUT an unhealthy background) I think it would look nice.
And yes, Madeleine should avoid the sun and the tanning bed! And I don´t know, what this girl does with her hair, but sometimes it looks really washed out and jejune!
But on the whole I ALREADY like their style, yes-sometimes there are a few outfits, which are less cute, and sometimes outfits of them are terrible, but mostly it looks great. And just imagine (especially in Victoria´s position, Madeleine has less official duties) you have to find for about 100 occasions/year an outfit, which isn´t too crazy, too boring, too tight, too loose, too old-fashioned, too modern...and it should be varied, but it should also fit to your natural beauty/coloring. Not an easy challenge!