Based on Kenny's performance in Game 1 at RLA, he's a solid enough player.
The problem is that when he subs off Beal will go to the 1, and Prather to the 2. This means Redhage and Wagstaff will be playing 3, and Hire might be required to play some 2.
A starting 5 of Kenny-Beal-Prather-Knight-Jawai means they might do alright for the first 5 or 7 minutes, but when the 36ers start running at every opportunity and Cats need to make a sub- on the rotations, that's when I see Adelaide getting on top. It's not because Kenny isn't talented enough (although that could play a part), the query becomes that Perth will have half their team playing a role that doesn't allow their strengths to shine. For example Hire is a hustle 3 man who crashes the O boards and plays solid D. He is not, by any stretch of the imagination, a 2 man. But if Beal or Kenny get in foul trouble that's exactly what he'll have to be.