Include a community-based Firewall. Automatic decisions about the process communications based on community data (prevalence in the community, age of the process, ...).
Prevents limited users from changing security settings and disabling the AV.
Advanced configuration option: add the option to ask the user what to do (neutralize, ignore, exclude) when PCA finds a virus.
Add community data to the Process Monitor: prevalence, first date seen in the community, etc.
Include in the product the capability to send files to PandaLabs (false possitives, suspicious files).
Web central console, to remotely manage all my friends & family PCs.
Ability to change my email from MyAccount
Cloud AV available for Mac
CloudAV for Linux.
Button to manually update the offline cache.
Option to exclude files from the behavioral components.
Since we are throwing out several ideas here that can be nice additions to some but may seem like destroying the lightness of PCAV to others, risking to get a bloatware stamp in the future...
How about keeping the core light and easy and have a add-on/toolbox area where you can add the parts you want to use, similar to Firefox add-ons for example.