A Head Coach really doesn't have a "need" to EVER speak to anyone but his coaches and players. My point is simple, if he's GOING to talk, then speak the unvarnished truth. It wouldn't hurt MY sensibilities one iota.
MY bosses have little trouble throwing members of the staff under the bus when mistakes are made. Learning how to take criticism is part of growing up. If coach/athlete egos are THAT fragile, then this would provide a well-needed overhaul.
Maybe I'm unique, but it (coach speak) bothers me whether the team is winning OR losing. I can live with a coach saying "Hey, we played a lousy, sloppy game on both sides of the ball and got one good bounce that made the difference."