IMO your OK staying with a long rod. As long as the package is light enough to get a quick hook set. I use one rod for all my jig fishing. A 7'6 MH, XF, in a light sensitive rod is perfect for all my jig fishing.
More important than length though, is that a sensitive rod is going to help you detect bites better, and that means more fish on those days when it seems like they are spitting it right out.
For jigs, instead of forking out big bucks make your own. I've been using unpainted heads from Poor Boy's, and painting them myself, and hand tie-ing the skirts using braid in place of a rubber collar. I won't go back to pre-built jigs.