Good idea, but if the only thing we know is that Luke got his saber back we’re gonna wonder why he doesn’t have his saber.
In Force Awakens, we never see Luke accept the lightsaber. Even in The Last Jedi, we know from watching that Luke throws it and Rey picks it up again to practice with later. Perhaps the saber toss scene is not needed. Rey just holds onto the blue one.
As for the humor, it doesn’t feel right to remove every joke, quip, sight gag, and gesture. The movie should be tonally consistent with moments of levity, not a joyless slog.