Stag Lord said:
Yeah - BBSb!2 has the right of it. Depending on the trigger, Houses can have equal access to certain effects and still retain flavor and individuality. In Westeros block, all Houses had access to Put to the Sword and Tears of Lys - which killed characters for winning a military or intrigue challenge respectively (there was also a steal even for POW, but the effect was temporary so it rarely saw play). These were widely played - but since they were challenge based, they weren't universal.
Stuff like that can give all Houses access to important effects without compromising flavor.
I totally see your point.
I certainly never played Tears in my Stark deck. Now, my wife and her Lannister deck…