I really think they're doing the right thing. It is unfortunate given how universally useful it is as an application, but way too many services and companies try too hard to be all things to all people. Discord has had a single direction and a strong vision, and it's really hard to have that if you just want to be the world's best chat app. (Telegram feels like it tried to do that and well, it really hasn't gone as well as it feels like it could've.)
Splitting it in two is of course possible, but that comes with its own set of caveats in my opinion. Enterprise users have quite a different set of priorities from gamers...
Either way, I've worked at companies that don't know what they want to be, and it frankly sucks for many reasons. Good for Discord to know what they want to be.