She definitely could have put it better!! In fact, she really couldn't have put it worse - she was sneeringly unpleasant.
I didn't think there was much point in suggesting anything until we had some feedback from the OP - she may have decided to give up after that scathing putdown, & I wouldn't have blamed her ... I'm glad you haven't, @JaceLancs
FWIW I don't like the outfits & do think they're dated (apologies @JaceLancs , I know that's not your question, it's merely my opinion).
But the OP likes wearing a particular shape of dress that isn't in vogue right now, because it suits her - so wants a more classic look. LK Bennett is a good shout for that style of dress (as are, probably, the much-maligned (on MN) Hobbs & Phase 8, maybe Karen Millen).
Buying original 80s/90s dresses from the latter two might well even mean silk/linen etc!! As once upon a time they did use some lovely fabric.
Re the coat/jacket issue, I think a lot of women consider what they put over the dress to be an integral part of their wedding guest outfit. And it is often worn for a long time - for the church/other ceremony, milling around outside before & after, the photos, etc. Hence the popularity of those dress & jacket/coat suits that you see in all those (awful, IMO) MoB-type shops. And also the speciality of higher-end retailers/designers like Shibumi. Not my thing, but I think a well-cut take on the jacket+dress combination in a decent fabric might well be an option for the OP?