Just been reading the twitter comments linked above on the queen speech. Most of it was predictable. Some of it witty. The gold piano and lavish surroundings has caused outrage. The 'weighed down with gilt' comment did make me smile.
As pp have said, I believe Kate is now firmly dressing for her position and for posterity. And i think it will stay this way. Meghan will always be in the position of being more free to play with fashion and run with that risk of getting it horribly wrong in the pursuit of eye catchingly wow 'getting it right' outfits. Being the no.2 wife (of the no.2 brother, iyswim) must occasionally be a bit exasperating, but it gives you more freedom.
Kate's role weighs a little heavier. To me her approach to her image now shows how seriously and respectfully she is taking her role, and she is mindful of how history will remember her 'before she was queen'. Personally I think this extends to her weight too. Being very slim shows discipline and commitment, and this, for someone with the great wealth of the RF, protects against an image of self indulgent revelry.
I think she looks fantastic. Polished, beautifully groomed and respectful. It's how i'd want to look in her position.