Actually maybe you can, try this.
Open "AP:Notification" and search for the "Change Level CI-IA-Review" (or the one that suits you), and check into "Details" the "Message" used for notification (Message Tag):
Then open "Sys:Notification Messages" and look for this Message Tag, you'll find the "email template":
Then open "AR System Email Templates" and search for the email template and I guess, alter it.
I did those captures during the beta, so mileage may vary and it was for French locale (fr), so you'll need to adapt to your locale, but the idea is the same
In my case, as you could see the templates was pointing to the version without the links, here is the template with approve / reject links:
So anyway... I guess the idea is to find the right email template, and modify it should be pretty easy now.
Thanks for the assistance! We will be working on this over the next week and I will report back what we find.