When you consider that for us to be even added to Steam, it'd require consciousness from the management... so the lag would probably already be fixed at that point
Not happening though

Lag would absolutely have to be fixed at that point, no probably. Regardless of the quality of some of the games that make it to Steam at the very least they're playable, even if the gameplay is garbage. Graal is REALLY only playable during off hours when player count is low.

I doubt the playerbase would increase substantially so the cost of going through steam and all wouldn't be worth it. It would be more likely that the graal client used to connect to playerworlds/ mobile would become available before that happens.