I kind of want her just in case we get more player party-based content down the road. Having a character that can do a little of everything is great when you don't know what the other players might be bringing.
He's got a really cool design, and a super chill personality. Even Paimon teasing him or being sent on wild cocogoat chases barely seem to phase him. And honestly, listening to him ramble about the various minutia of Liyue culture has been one of the more weirdly enjoyable moments of the story for me.