f**k... I disagree with all of that. Just going off the teamlists for Round 20 alone, I'd say throughout the season Kennedy often outplayed Darius Boyd, Corey Allan (prior to his great form at the end of the season), Val Holmes (who was mud for half the season), Will Hopoate and Tevita Funa at least.
I think for a first year in he's done a solid job behind the merry-go-round of halves he's had to run off.. his ball playing is already at a state that Holmes' fullback player took five seasons to develop, his kick returns are solid, sometimes breaks the line and asks questions and his main problems in that regard have been communicating with Mulitalo. His one-on-one defence has been poor, but again, no fullback should have to be fixing that many mistakes made by the front line defence. His positonal play is not 99% shit, and my guess is you're basing that call on highlights packages of the tries we concede rather than a whole-of-game analysis where he's very, very often in the right position.
I know I'm overstating his strengths to compensate for yours and R-15's "one of the worst players in the NRL" calls, but I really don't get that analysis of what he's shown throughout a whole game in 15+ appearances this year. Of course he's not first choice yet, but I think he's shown f**king plenty this year to be in an NRL roster as a medium term second choice fullback.