With the consolidation of all the other skills, it seems very strange if they have still got a whole range of knowledge skills as implied by the Han Solo statblock.
If pseudo-medieval Bards can be well read enough to have 'General Knowledge', I wouldn't have thought it would be difficult to have a single 'Knowledge' skill that covers all aspects of knowledge in a general way (i.e. how well read you are). Talents could then improve knowledge specialties and stuff to provide any necessary specialisation.