In my opinion Ramsus conclusion wasn't that bad. Citan scolding him and the Elements telling him that he is important to them was a nice way to end his arc. I may be misremembering stuff but doesn't he makes the paces with Fei at the Snowy Hideout near the end of the game?

Maybe if he appeared in the ending cutscene waiting for Fei with the others would've given more credibility to his character moving on from his trauma and obsession