I have a European (GSM) unlocked Pre 2 with webOS 2.0.1.
The profile was migrated from a Pre Classic with webOS 1.4.5.
After entering profile account, I had these problems:
I had to enter my Google account password 3 times (got 3 notifications about that).
Google contacts and Calendar sync did only work from Google to the Pre 2. After deleting and re-adding my Google account, it seems to work in both directions now.
My IMAP (uwimap server) account did not recognize the special folders (sent, draft, trash). When using the same IMAP account with webOS 1.4.5, I had to enter "./" as folder prefix as a workaround to make it work.
After migrating to the Pre 2, I had to delete and re-add the IMAP account. After that, it recognized the special folders without using the workaround.
So, maybe webOS should delete and re-add all Google and IMAP accounts by itself during profile migration from 1.4.5.