If you want more angst, felassan didn't die but instead was made tranquil since it was implied that solas killed him while he was dreaming.

An even worse fate than dying for a spirit turned elvhen.

I can't even tweet about liking mythal without some randos coming to my page and calling me a slaver sympathiser 💀😭

Mind you I was just providing a different take on mythal based on the new codex.