It would give him something which could help him understand Pearl a lot better. Maaaaybe fuse. :O

Has Steven experienced much in terms of jealousy?

Do we know, specifically, that Rose's shield can't be used to smash a Diamond?

She doesn't have to be a Diamond's Pearl but Peridot said she is a "fancy one."

I wondered how Rose was able to so decisively beat the Ruby fusion without destroying any gems. Her sword is a combination lightsaber nerf-bat.

Not to mention that given that most of the other gems were fighting with axes and swords at the time, Breaking Point would easily have out-classed most of the weapons on the battlefield.