I give it few months before he disappears again contrary to what he says, but then again Leafy is still uploading videos so who knows.
Even then, antidepressants isn't a good topic to start off your return honestly especially I've heard the depression from him a lot now.
This year has been one helluva rollercoaster. I think Leafy made his return deliberately to add chaos and madness into this horrible year we've had so far, and Grade is just following suit. Essentially it's just an "anything goes" situation.