JB appointed JT in late 2016 with the express purpose of stepping down and handing the reigns over to JT, JT would have needed probably 18 months under his belt before then so that would peg JB's ideal retirement in early-mid 2018, and even after JT was fired, JB announced in something like late 2018 his intention to retire in mid-2019, so he was moving in that direction for some time. I think EB is just trying to make herself look good so that she can pick up more board appointments.