I believe I am right in saying that all currently sold Groove Agent expansions have now migrated to Steinberg Licensing. Simon Phillips Studio Drums has certainly migrated, as my licence for that library is now on Steinberg Licensing.
The decision on what migrates when is not a function of price, but is likely to be a mixture of technical complexity and legal considerations.
I am still waiting for Alto Glockenspiel and Guitar Harmonics to migrate. Those two expansions and VST Connect Pro 5 (which is a work in progress with no promised date) are the last licences I have on eLicenser.