Not to be an "Argue-Andy", but was his constant communicating with Star Fleet more,in line with the secrecy, sensitivity and nature of the mission?...maybe I need to go back and look again at the kinds of missions and decisions the Captains make...I said it before and I will say it again...it is GREAT to be on such a knowledgeable forum concerning something so important to me...I thank you, Cyke and Terrell, and all the rest...
You're welcome! To answer your question, it's not clear if that's why he was doing it or not. As Esteban appears only in The Search for Spock, it's impossible to know how he behaved during other assignments that weren't as sensitive.
I think it's reasonable to assume that Starfleet required constant updates on the status of the Genesis survey. But having said that, Esteban struck me as one of those "politician" type officers, and would probably have been on fast track to the admiralty.