There have been several discussions in the past about searching for an alternative for Avalon/Phoenix. The main reason might be that the Avalon project has closed.
I find it difficult to name the things all that fancy framework do. And It seems the developers of that frameworks don't seem to have a consistent naming either. So what is OSGi? A platform? A microkernel? And Phoenix? And Avalon? A container? So we should define it here.
To be able to discuss switching the framework we need a summery what is currently used and how.
The first thing to to talk about would be the platform/microkernel the application runs in because that might limit the possibilities for the integration of additional frameworks.