Question before I upgrade from 2.5 to 3.0

Running vBulletin 3.8 with vBSEO and Sitemap 2.5 and everything is dialed in and good to go with Google.

If I ugprade to Sitemap 3.0 and then resubmit my Sitemap into Google, will I lose anything? What about all those thousands of pages that have been indexed into Google? As it is now, I've seen my forum's threads archived into Google within an hour of them being posted, so I dont want to lose any positive traction I've already gained.

Thoughts?

While no one can predict what google will do, all of our results have been positive.