You're assuming that's what I intended. I think there needs to be more initiative to level those "base classes". You would keep your GLA levels, but these new classes would come from the base classes. Perhaps at high levels something is learned on those base classes that makes them attractive. You could change back to GLA, or play DRK. I have no intention of 'doing away with' the base classes. Perhaps GLA at high levels gets "Mighty Strikes" and no other class gets it and it's not cross-classable.
My big point of contention is the fact that I feel one should be able to fully experience classes like SAM or DRK. Not have them as simply specializations.