I feel like Bloodraven's intrigue and prowess be higher

The guy was a better master of spies than Varys and was basically the Big Brother of Westeros, yet his intrigue stat is lower than Walder Frey and Larys Strong.

As for prowess, Bloodraven wielded Dark Sister, the sword reserved for the deadliest and/or most loyal Targaryen. And he was able to defeat Bittersteel in a duel, a guy who spent half of his life fighting in Essos with the Golden Company.

It's just that, with everything that we know of him, it seems to me that his stats should be higher. Furthermore, I also think Shrewd and Intelligent should be some of the traits he should have.