The President wrote:
My point is that instead of integrated BP into the MU, they try this dumb stunt of getting all the black characters together for no reason.
It's like if GL Jon Stewart teamed up with Cyborg and Black Lightning instead of calling the GLC. Or that terrible story (I don't remember what comic it was in) where all the MU women teamed up - including Sue Storm, because the rest of the FF wouldn't have been a big help right?
Personally, I think you're missing something very important here and it's the fact that Panther does have relationships with these two characters.
In Cage's case, the two of them have been buddies for quite a while, with their relationship being apart of a few of Priest's stories and that was used in Hudlin's book, as well. Also, one of the subplots of the current meta-story is the fact that Cage calls out Panther on how his quest to prove himself has him shun everyone around him. Once you read the full run, you'll understand why calling Cage makes sense.
As for Falcon, T'Challa gave Falcon his Vibranium wings (and ironically, he's one of the only people who was truly affected by that crap Doomwar ending, but I shouldn't be shocked) and they both have a relationship fostered on mutual respect. If one needed the other's help, the one called upon would probably drop what they're doing to help the other.
With that being said, you could make the argument that Daredevil would've been better for this than Falcon, but T'Challa's honor system (and yes, I'd also agree that his honor system is a significant fault of his). wouldn't allow him to call Daredevil for help after said character trusted him to look after Hell's Kitchen. So there's at least a plausible story reason for leaving him out, unlike Bendis' treatment of T'Challa in Avengers #19.
I know you may be wary of this, but I honestly think this is one of the best thought out team-ups in Marvel in a long ass time, much better than Hawkeye leading Secret Avengers, at least.