Not really. They're pretty much just a replacement but at least they're oil tight unlike trying to rebuild a set of forks with rusty, pitted tubes. I think the biggest advantage is that the springs are internal rather than external as on the stockers. You can still use the stock boots and headlight ears and unless somebody pulled up the boots and looked no one would know they're not stock. Another vendor on eBay sells CT-90 fork rebuild kits with the boots and such. Buying a rebuild kit and the replacement forks is still way cheaper than rebuilding the stockers if your time is worth anything.
Improving their action would be a matter of heavier fork oil, welding up and redrilling the dampener holes and trying to find stiffer springs. We're definitely not talking cartridge forks here...