Yeah, the Super Hero is good for beginners stepping into creeking, like Ben Stookesberry and Jesse Coombs.
I've paddled the smaller versions of each: Jefe & Hero (but pre '11 design). Based on that, I would say the Super Hero would alleviate at least part of your complaints. It's obviously lighter and on the water it feels much sportier than the Jefe. I felt like the Jefe wants you to keep paddling it aggressively in order to stay in control. The Hero allows for lighter paddling and quicker moves. When I first looked at the Hero I thought I was going to hate it because, esp. the small version, looked ridiculously short and bulbous to me. I demoed one for a weekend. My first run was on the Big South and after 15-30 minutes of adjusting to it, it felt great. My first run ever on Supermax on Bailey was in this boat. If you're not digging the Grande, the SH seems like a good one to try.