This is the worst fiction of the lot. Which is a shame as the Unicorns are up-there as one of my favorite clans, But I expected this when I saw who wrote it.
1. Why would any Clan champion agree to a wedding to a lesser Family (any Family other then the Akodo) and give up their name and position. Just to resolve a argument over some land. And adding a new in-world tradition that brakes with the normal tradition of the person of lower status (the daimyō of the Ikoma family) takes the the higher status name and joins his/her family
2. Like some others the whole curved bladed/ meishōdō issue seems out of place. Its been 200 years get over it.
3. The divorce was the nail in the coffin for me on this fiction.