Hi Pete,
This is a great discussion item, and I am glad that you brought it up! There is a lot of information out there, and how to syphon it so it relates to you is definitely something that is important.
Couple points/questions on the above, and then some information that may help future wise.
There are many notifications within the SAP Support Portal that you can subscribe to. Some require filters, some are based on 'subscribing' to Spotlight News or to specific notes and KBAs. Happy to set up some time with you to go through these in detail.
What is the URL to the SAP Security Portal you mention? Are you referring to this area: https://support.sap.com/kb-incidents/notifications/security-notes.html?
Future direction is focusing on personalizing your experience within the portal. Giving you what you need, when and how you prefer. We can chat on that as well.
Feel free to reach out to me directly.
Cheers,
Kristen