UBS just launched a huge shake-up

UBS just announced a big shake-up in its investment bank.
A trio of senior staff are leaving, according to a memo sent to employees by Andrea Orcel, president of the investment bank.
Here are the headlines:
Chris Murphy, who had been cohead of FX, rates and currencies, or FRC, is leaving. He will stay on at the firm until September.
George Athanasopoulos will become sole head of FRC.
Roger Naylor, cohead of equities, is leaving.
Robert Karofsky will become sole head.
Matt Hanning, who had been h