From an outsider's pt of view, it was an odd time-out, even the radio guys called it out as "unusual". The game was using a running clock and the result was no longer in doubt so there was no tactical reason for it. However, logically, there must have been some reason, and it was likely related to the players . Only the coach knows for certain.
The biggest issue an opponent might take with such a move is the need for another, completely unnecessary play to be ran. Anything can & will happen on the field and you are putting players at risk, even if minimally. Fortunately, nothing bad happened and hopefully whatever goal the coach had in mind was accomplished. No harm, no foul here.