Slightly related to it: it was not possible to run OTDT and AJDT (SpringIDE and possibly ScalaIDE) in the same Eclipse instance. Will that change with Luna? AFAICT osgi weaving spec should enable it, or I expect too much?
We have already updated Equinox weaving to be compatible with Luna's OSGi weaving hooks. This is now available in the equinox git repository, but I am not sure if it has made it to master. We have not started working on a Luna-based AJDT. We typically don't start working on the next version of AJDT until M3 is available in the new year and we make the first release publicly available in time for EclipseCon.