I think I might be able to jury rig a ton of that based on the random build system if you pick a build in character builder it uses code from the build definition during the random advancement too (basically have versions of feats that are level limited and recommended for a build) The idea wasn't just pie in the sky, CBLoader allows one to have an updateable online source too.And that was the obvious flaw in putting builds in a book, they were obsolete on day 2. Building something like that into the CB would have made a lot of sense, though. Especially if it would have had something like an option to upload your builds to DDI and let other people share them! This was the sort of stuff I was waiting for WotC to figure out, and they never GOT IT. They moved CB online, and did squat with that. It had a lot of potential.
One just needs an online context for building and creating new content. Its a bit of work... but rather tempting basically it would publish custom content and users could vote on favorite content and we could have personal favorites and one could have a file you downloaded and would control the content from that site that your received.