In the past we've struggled in Reynolds absence by trying to play a manufactured half to replace him. We've tried running 5-8ths like Walker, Sutton or Keary and I believe we have tried a hooker in the past (Isaac Luke) as well. It hasn't quite worked as we've had to change up our playing style dramatically to suit these makeshift halves. Luke Kelly is a similar style player to Reynolds ( just not as good, like Reynolds is the same style half as Cooper crock, just not as good). If Luke slots in then everything else remains exactly the same. To make Sutton or cook work their has to be changes made to the way the team plays.
I do believe this exact situation is the reason the club went after Luke ( after injury to Connor Tracy) as opposed to trying to find another young guy, and it's the reason Kelly was given time during the charity shield