I have not yet read the responses to the initial post (I will today), but I wanted to clarify a few things.
I believe the multischooling system in Horizons has been proven to be a success.
The current content for that system (the skill progression, abilities, and masterable abilities) was not the best implementation possible, but was good. We will continue to adjust it to make it better, while trying to preserve people's investments of time in their characters.
The next world that I would build would use the multischooling system again. It would have different content, changed due to the lessons learned in Horizons. This is the basis for the report from Warcry.
The original intent of the multischooling system was to allow you to play the role that you chose from among the roles that you had earned. If your friends needed a damage dealing wonder tonight, you could fill that role because you had spent the time to master that role. But if they needed a healer to save them from their poor choices in combat, then you could fill that role as well. It was not intended that you could fill both roles simultaneously at that same power. Choices are good. Being able to retain your character's name, appearance, social connectionsand reputation is good. Being able to do everything, anything, without possibility of failure is bad.
Thank you for playing Horizons,
David