The problem could be analyzed in this way. There is the Debian Frontier composed by debian-developer/mantainers. Outside the Debian Frontier there are the freesoftware developers. Some debian-developer are freesoftware developers and some debian-freesoftware-developer are at the same time the maintainers of his own developed software (with or without comunity supply).
So the freesoftware developer/comunity develop Alfa,Beta,RC and Stable relase of their software. They choiche in your own opinion when a software tool is Stable to relase. So a Stable software exist also outside Debian Frontier. The question is. Is a new stable software ready or useful and Stable in debian for debian Comunity? Debian is a very big comunity. Over 10.000 packages. Somthing could make the system not functional in a way of a upgrade. The problem already exist for the applications still months in unstable waiting for dependencies. No problem. This is monitorated by "Why this application is not in testing?". So why we couldn't create a general overview by the betwen upstream, that for definitions are external from the debian frontier e the Debian project internal space of experimental/unstable/incoming(delayed incoming). I don't want angry Mantainers, so to be forced to "to pack a new upstream although the benefit to the user is actually doubtfull." By an actualizzed overview of the external upstream situation in comparison to the package in the official repos could give a Great Overview to the QA if somthing is going wrong, in a 10.000+ packages system, in the state of healt of a not only stable but also updated distribution. A single mantainer cannot - alone - view the general armonization of the system. Actually we mointor the internal system? General Monitor what there is outside our own Debian frontier could be the next step for Debian? Friendly, Blu.