Characters used to have a lot of knowledge skills in Ilfreann, representing a lot of information and skill available to the original cast. These have reasonably been forgotten as part of the memory loss / mental changes during the transfer.
Legacy Knowledge Expertises
Proposal: Allow characters to regain some of their old knowledge in the form of legacy knowledge expertises. The current bonus 'Ilfreann' knowledge expertise covering basic Ilfreann knowledge would just be one example of a Legacy Knowledge Expertise.
Legacy Knowledge Expertises are chosen by individual players and it must be something that the character reasonably knew on Ilfreann.
For example, Kukichi would reasonably have knowledge about architectural designs, and had Knowledge: Engineering 14 with a +24 bonus. Thus, the Architectural Designs knowledge expertise would be an appropriate bonus knowledge expertise. However, despite his extensive knowledge of architecture, Kukichi could not reasonably have had knowledge of Kalinian Alliance Architecture. Thus, it would not be appropriate.
In all cases, the player must actively propose a legacy knowledge expertise to the storyteller and get it approved in order to become eligible.
Earning Legacy Expertises
Proposal: Rather than buying the legacy knowledge expertises in the traditional way, allow characters to earn these outside of experience gain as a 'parallel system' to reward taking initiative in the exploration of the setting.
To unlock a legacy expertise, the character has to unlock some sort of new knowledge in Maalum. (TODO more)