Believe me when I say that you did not miss out. Both Brian and Hawkeye were really quite poorly portrayed on Secret Avengers. Both characters had their personalities reverted to some long gone age, which was probably the last time Remender actually read them.
In Brian's case this was particularly damaging, because Captain Britain & MI13 had repositioned the character, his powers and premise, so incredibly well. Most people who've follow the character long term have been greatly frustrated with Marvel's handling of the character almost ever since he was brought to Excalibur. It's seen as a deviation from the character's roots. CB&MI13 viewed the character as a whole, and rebalanced it as a much rounder and fuller version.
Remender did not keep any of that. He shoved him back in his old costume and had him behave like a stroppy and petulant child. So many errors on Uncanny X-Force, based on not having researched the character or the Braddock family properly. It almost went far enough to be considered a character assasination carrying through into Secret Avengers.
I have far more confidence in Hickman handling the cjaracter. After reading his Ultimate Thor serues, which made use of Ultimate Brian, I have confidence that he can deliver on both the character and portraying the mystical side of his powers wthout making it all sound too daft.
As I posted above, that side to Brian is considered to be in the past though. HE's both matured and grown a heck of a lot since the 80s. Even became a pacifist for a brief time on Excalibur, before returning to being Captain Britain full-time.
I wish people would stop trying to return to that, to be honest. It's like focussing entirely on how we all behave aged like 17 to 21 - believing like we know everything there is to know about life and the world. Until we encounter Life. And the World. And realise we don't.
Likewise. I'm a fan of Cho, too. This is just such a logical set of characters to be making use of. Yes, they have some baggage. But that also brings some other opportunities with it.