Simple Champion Mastery improvement idea

I thought of a very simple improvement to the champion mastery system. Nothing big but the champion Rank 5 titles are so similar and uninteresting. I get it that Riot made the titles generally based on the playstyle of the champion (assassin, marksman, support, etc.) But I think it would make reaching rank 5 more satisfying if each champion had a title that more closely personified the champion.

For example, maybe rank 5 nocturne is called "Nightmare". Or maybe use something related to the champions title, like Renekton's title being Butcher. I just think this would make rank 5 more interesting for each champion.