Rank has its privileges, i.e., somebody else has to do the math.
Truly, though, every commander came up through the ranks just like his 1WO and 2WO are doing under his care and, at least early on, had no doubt spent plenty of time doing all the things that he would then rely on them to do once he was in top spot. So in theory he would have to have acquired those abilities AND considering that in combat anything can happen, including the loss of those you rely on, he'd have to retain proficiency in them.
The biggest thing I see is the multi-tasking aspect - the kaleun has to be aware of EVERYTHING. That he relies on others to provide him with necessary information and assistance is to be expected, he can't be everywhere doing everything. His biggest responsibility IMO is to know how to take that information and assistance and decide what needs to be done and when in any critical situation.