She needs to start wearing high street and be photographed in the Windsor branch of Waitrose.
There's no need for her to turn into a Kate clone!
I can't get too worked up about Meghan wearing foreign brands - given the choice between Givenchy and Stella McCartney, I know which one I'd choose! She has worn more British brands recently though, I guess she likes to mix things up.
As for Beatrice, I think the talk of marriage is all media hype. She's only just started seeing this guy so it's very early days. She's known him for a long time though, so I imagine she knows all about what happened with his ex. Which is more than the tabloids know, that's for sure!