It would make the paid user features more attractive at a glance, because they would be in ONE place, rather than in eight bilion. /paidaccounts.bml hasn't been updated with a lot of the new paid user features.
Specifics of what I'd move:
What is the directory?
How do I add a poll into my journal entries?
How do I make a custom style?
Custom Mood Themes
What are the fast servers?
How does the text messaging feature work?
New FAQs that I would add:
What are the benefits of having a paid account? (comprehensive version of /paidaccounts.bml)
Can I forward my domain to LiveJournal?
And possibly, if the category were called "Paid Accounts" and not just "Paid Account Features:
What's a paid account? How do I get one?
How can I buy a paid account for somebody else?
What happens to my paid account when it expires?