Made another game, with a fun concept :
3 houses (Stark + Lann + Martell)
3 houses (Arryn + Baratheon + Tyrell)
(and 1 vassal : GJ)
The 1st house with 7 VP (or alliance of 3 houses with 14PT) win.
Targaryen won while the 2 alliances were strugling with 9-11 VP.
I made two changes : the vassal does not have support* order anymore but a standard support order.
The small council was very interesting :)
Share big alternative variants (similar to and expansion), or maybe just talk/discuss small alternations to the official rules for better balance!