I must admit, one reason I swapped is I went from a "S" that was difficult to pronounce and spell to a "B" that was simple! Ahhhh, convenience over romance, that's me!
I've never really felt inclined to change my name if I ever get married, not for any particular reason other than it feels like a lot of work for something that's just not that necessary. That said, I like your thinking on this. Mine is an Irish last name that gets butchered to high heaven, so should I ever marry someone with an easier last name that I like, I might actually consider making the change!

Also, sort of related: When I was with my ex, we had talked about possibly getting married at some point in the future. I had told him I didn't really like wearing jewelry, so the ring might not get worn all the time, and also that I probably wouldn't change my last name (aside from my own reasons, he also happened to have one hell of a crazy Scottish last name).
He didn't care about the ring thing at all, totally fine with it, but he was rather miffed about me not wanting to change my name. I found that surprising! You'd think it would be the other way around!