Charlie has forced out some great senior executives who spent their careers at BNYM and replacing many of them with suits from JPMC. I don't think that Jamie Dimon would be happy with losing so many of his "top talent" to a competitor, especially to his buddy's kid...Unless that was the plan all along.
Is there any possibility that CS being put in as BNYM CEO was orchestrated by JD? His instructions may have been to do whatever it takes to reduce headcount, lower stock price, and perhaps even destroy the business so badly that JD could swoop in, take over, and become the hero who saves the oldest bank in the US from the brink of collapse? He already has his disciples in the door so won't have to worry about descent from leadership.
Considering that JPMC was originally founded as The Manhattan Company by Aaron Burr specifically to compete with Alexander Hamilton's Bank of New York, this could be a 200+ year plan in the making.