I don't' know that. He seemed to have a well laid plan for everything, including engine efficiency & bridge station configuration. It's very possible he drew up a proposal & in it had already accounted for everything you see him do in that 1st day or soI doubt "change the Enterprise to a four shift rotation" was on the mission statement.
No. Let's stop the buck where the buck is supposed to stop.So let's blame everybody except darling little Jellico who can do no wrong?
He is not some overlord. He's IN the chain of command, & working with what he's been directed to work with. The bad decision comes from above him IMHO, & all kinds of other unpleasant moves are now taking place in its wake.
Waiting to implement his change until afterward is moot. He proposed it be done FOR potential battle conditions. He has reason to believe it was a more viable configuration for that situation. You're questioning him with no relevant info to support it beyond your own interpretations of what should be done... That are mostly rooted in what the crew likes better.