Is there a module out there that allows you to add additional page settings to a page without altering the core?

I am trying to roll-back some core mods made by a client, and this is one where the core mod may have to stay.

I didn't think so.  However, I was thinking that using the HTTPModules handler, we could intercept Page Setting requests, and replace the page with our own extension (copy) of the Page Settings.  What do you think?

Basically, four very useful settings we added to the Page Settings: 

1. Breadcrumb (to optimize the text for SEO)
2. IsSecure (this is a pre-4.6.x install, so this setting will not be necessary once we upgrade)
3. IsNoIndex (to add a no index meta tag)
4. ReWriteURL (to give page editors the ability to change the URL to be SEO-friendly)

As you might be able to tell, this company has a very, very good idea about how to optimize their content for SEO, and I have seen first-hand how their sites jump to a PageRank of 10 in no time flat.  Of there sites, about half are DNN, and I am trying to get their install as close to the DNN core again as possible to allow for an upgrade path.  Our goal is to get to 4.8.2 for the security upgrades.  Right now it is at 4.5.5, and these settings are something that may end up being a hurdle and have to be built in to each upgrade (prior to upgrading).