Put simply, the latest version of 10.7.2 contains all of the bugfixes of 10.7.1 plus some additional things. You'd be losing rather than gaining things. You are downgrading, after all.
Unless you've experienced any problems on the developer preview of 10.7.2, I strongly suggest you avoid downgrading. Odds are, you may experience completely new issues if you try this since some upgraded bits from 10.7.2 will inevitably remain unless you do a fresh reinstall.