Didn't read through all the posts here so this might have already been said, but anyway.
I did a houserule a while back where Generation and Blood Potency are completely divorced. Generation in this system is a Supernatural Merit that allows the player to start with a higher Blood Potency than a regular character and it can't be reduced below the starting value through the fog of ages.
For more info see this google doc. https://docs.google.com/document/d/1...it?usp=sharing