That….could actually be an interesting catalyst for a Steven/Jasper bonding episode…..

I mean, you ask a person's friends for their strengths and their enemies for their weaknesses.

And honestly, since Jasper doesn't think of Rose as Pink Crystal Jesus, she is not broken up to the point where she can barely talk about it in terms other than vague reminiscing.

Hell…Jasper could be the one that could actually train Steven to match Rose's strength. She doesn't hold her punches, obviously, and she is the most familiar with what it is like getting hit with Rose's forces. While I doubt he could do things the way Jasper expects, he might blindside her with his own Steven-y way.