Should I negotiate my severance? (update)

I was offered 8 weeks of severance after 8 years as an event coordinator, and I have a few days to sign. There is a non-disparagement clause. Did anyone negotiate and succeed?

An hour with an employment lawyer cost me a small fee and made me feel much safer about signing.

Ask for the offer in writing and do not sign on the spot. A day or two to think is normal.