No, the perspective of Future on her and Steven going through similar stuff was good, the problem is that they just gave her 2 episodes and that was it. If Future was about both Steven and Jasper solving their issues together it would have been cool, because that way you have both of them interact with the rest of the cast, getting help from everyone and coming to a conclusion together. Maybe saying "make it all about her" makes me look like too much of a fag, but considering they where the only two characters in Future who went through any arc whatsoever I don't think its too ridiculous.
I also would tone down severely how dumb she is. Jasper not knowing what grass is infuriating to me to no end considering she's from this planet and fought a war here for thousands of years, Why make her being an Earthling such a critical part of her character if she's just going to act as clueless as Peridot did.