my divorced parents would have felt uncomfortable walking down together
I’ve heard that some people have an issue with a divorced “couple” walking the chosson or kallah to the chupah; some kind of negative segulah. I don’t know much about it, though.
As for my kids, I’m going to do whatever makes them happy. If they want me to walk them down with Eeees, I’ll happily do it. If they want me to walk them down with their future father-in-law, I’ll happily do that too. It’s their big day, not mine, and their wishes should be respected.
You have a great attitude. The problem arises when the mechutanim have a different idea than either the other set or the kids. I hope you don’t encounter that.