The thing is that between release builds you get many many dev builds, many include just simple bugfixes (those bugfix lists you get for release builds are only from last dev build -> release) as well as what could be "under the hood" work.
If schine wants something tested specifically they'll mention it, either to testers MF(since they seem to be in on everything) or the community at large.
Most of the time though making patch notes for dev builds is a waste of effort. If you need to know about it you already know what needs testing.