Lesnar's a good coach.
His team is still suffering from the backlash of Lesnar's WWE days. Lesnar's team resents their coach being a "guy from WWE" and doesn't give Lesnar the respect or credit he deserves.
That's why they're losing.
Even if Lesnar gives them good advice or training they won't listen or take it seriously because he's just "some fool from WWE who doesn't know what he's talking about".
I think the people on Lesnar's team who do respect and like him will do well. Chris Cope seems to be one of the few guys who likes and respects Brock and he won his fight.
Len Bentley -- Brock told him from the beginning not to let the things about Chris Cope being a "double agent" get in his head. Len Bentley didn't listen to Brock and let the drama get to him. End result -- he lost his fight.
Charlie Rader. Brock told him to get off the fence. Charlie didn't want to listen. Ok, Brock switches to plan B -- stay inside and throw punches, elbows + whatever. Charlie doesn't want to listen. He does the complete opposite of what Brock tells him. Charlie loses.
The people on Brock's team are being idiots. That's where the weak link in Brock's "coaching" is.