You've probably already done something with the kits, but I agree with the earlier post that doing at least a partial boil with some hop additions and dry hopping can really transform one of these kits. I'm part way through a batch of IPA from the same kit with a few enhancements, and I cannot believe it came from a kit.
My buddy and I had one of the Coopers IPA kits a couple of months back and came up with a plan to do a partial boil with a bunch of hops additions, followed by dry hopping. Brew day comes around and it turns out both the u-brew places in town were closed, so no hops. Anyway, after a long search, we ended up getting a paper bag (~4oz) of rather old-looking, generic whole leaf hops from a health food store. No idea what variety, but we threw a big handful in at the start of the boil, then smaller handfuls throughout the boil. Used the dry yeast from the kit, then threw in a couple an ounce of hops to dry hop in the secondary. We did a red ale kit the same way without the dry hopping, and it's also a big improvement over just following the kit instructions.