Also, my guess is that that dress is Beatrice's now. And after her it might go in whatever collection keeps historically significant royal clothes. Maybe, when we're all really old we'll see Beatrice's daughter wed in it :)
I think Beatrice has always had a very personal sense of style, never afraid of fun and silly and occasionally "risky" hats for exemple. Not only the "loo seat", but also a head full of butterflies and other exemples. This is probably calming down now with maturity but she has the perfect look for vintage and it is so nice that she dared do this.
Especially since so often the British princesses of her generation and sometimes the older ones too, are pretty much treated in public like their only worth is as clotheshorses in whatever esthetic your gutter press (and fashion press) deems desirable for the day. Not much space there to be experimental even if you'd love to be.
I think they must have had a lot of fun planning this low pressure private wedding. The Queen probably loved being involved. There must have been lots of zooms from fittings.
As for photos with the couple's parents and other family, of course they exist. We'll probably see them eventually in some context but for now this chosen tactic, weather intentional or not, has really given Beatrice and her style revenge the spotlight I think she deserved.