No. The beta build is loaded with the most recent changes, as far as we know these changes are related mainly to the work of Parrot as individual distribution (built-in apps), other package updates are always avaible as they come.

Until the next release comes this is what we have. If you take a look over the development discussions there is a large (and increasing) list of changes and some of them are kind of critical, it wouldn’t be right just to make these changes available along the normal upgrades, that’s why the beta testing exists.

Parrot is a rolling release distribution, which means there shouldn’t be too much issue with upgrading from 3.x to 4.0, but a fresh install is always recommended.