This is more of a general Kearney love-in than a reply to anything in this thread, but personally I'd rate the ability to field kicks and not make stupid f*** ups as for more important in a fullback than scoring the odd try off a counterattack. Sure he's not an amazing counter attacker but his ability to organise the defence is vital and his positioning is the best in the world (and his fielding is better than everyone except Folau) imo. He makes a big difference to the players around him too.
He ran very well with the ball in hand today, it'd be nice if he made linebreaks for fun but at the end of the day that's a bonus at this level.
The amount of criticism he gets is ridiculous considering he's a test lion, was European player of the year in 2012 (when he was the most dangerous attacking player in a Leinster backline that included O'Driscoll, D'Arcy, Nacewa and Sexton) and has 80-something Ireland caps. There's a reason that in the four Six Nations we've won in the professional era (09,14,15 and 2018) he's started every game along with both wins over the All Blacks and two victorious Heineken Cup finals. Players don't end up with records like that without being very very good.