I find this suggestion completely stupid. I understand the motive behind it, due to a whole 0.1% improvement of stats, however it ruins the entire point of the system itself.
War Avatar Champion, ect is meant to be a mark of Pride moreso than stats. You've collected everything, you've had the maximum amount, ect. Then you can show off to everyone that you've worked for that title. A donation system for a title sounds completely ridiculous considering it barely affects your stats.
Thats just my two cents