Question on wedding gift etiquette

[Sundae]

Wedding etiquette is an anachronism.
People should feel free to celebrate their marriage in any way they see fit.

That said, the groom isn't usually the one pushing the formal side, so you might find his bride has other ideas.
My husband and I clashed because he wanted to come dress shopping with me ("It's my wedding too!") and because he didn't understand the concept of a Wedding Breakfast, preferring instead to go straight to the buffet and therefore have everyone involved all day, rather than splitting the guests into ceremony and evening.

We did stick pretty much to tradition in the end, but because of a few things we changed, everyone thought of ours as a really bohemian, ground-breaking wedding. Partly because we were the first people amongst our family & friends to take advantage of the new wedding licence - prior to that it was either church or Registry Office (which was often in a grim Council office, even if the room was made special).

Didn't help us in the long run of course.

Which is kinda my point. Who cares if a couple don't seat their top table according to tradition, or don't have a receiving line, or get their prizes sent to the office? If they are happy and committed to making their partnership work then good luck to them.