Bloodline Strength Vs Score

In the new BRCS will it thoroughly explain how bloodlines gain and lose their potency? I wasn’t too fond of the part that the bloodline scores vary between siblings stuff.
I actually came up with my own system let me know what you think.

Tr Gr Ma Mi Ta
Tr Tr Tr Gr Gr Ma
Gr Tr Gr Gr Ma Ma
Ma Gr Gr Ma Ma Mi
Mi Gr Ma Ma Mi Mi
Ta Ma Ma Mi Mi Ta
Un Ma Mi Mi Ta Ta


The bloodline score will be average of the both parents scores rounded down.
Blood Strength can be raised/lowered is your character loses or gains enough blood points that would bring him to the minimum or maximum.

Bld Str Min Max

Tainted 1 20
Minor 5 40
Major 15 60
Great 25 80
True* 35 --

Should a character with a great line reach a score of 80 he would not go up to True unless he has done something truly Heroic that espouses his bloodline derivation. (examples Andurias-unify Anuire/Kill the Gorgon; Masela- Destroy the Serpent/Bring Back the Masetian Empire, Vorynn- Turn the Vos back to Ruornil, etc)