Hi tazmandev, and welcome to PhpDig.net!
To see the changes in versions, just check the
Changelog and the
Feedback & News forum for 'sticky' posts.
Some mods, while very good, for example the is_executable mod, won't work on all OS. Some mods, like the language packs, I forgot to include in the last releases. Shame on me. A single mod, like the one for redirects, doesn't warrant a new release. Sometimes it's just simply a matter of time.
While there's no guarantee that all mods will make it into a new release, if a mod is included, the
Changelog will say something like "blah blah added (thanks to blah)" but if in doubt, just check the source code.