My guess is that the reason Leka is being given some middle experience is that
Webster is looking to foster his Andrew Fafita qualities, this will prove especially true if Leka keeps growing physically.
I see his blooding in the middle as just part of development plan specific to him as someone special that could play anywhere in the Scrum outside of hooker.
Webster likes leg speed in his props and he likes some footwork and hole running from his props when they are inside the opposition twenty (AFBs role).
I take it
Webster wants leka to speed up our middle third, add some unpredictability in the middle, and use his mass, speed and foot work to win that ruck, especially when
JFH and or
Barnett are off.
I also believe
Webster is smart enough to imagine Leka the big fast mobile middle forward being placed on an edge for a set play.
I actually think it will be good for him.
Part of where Lekas future lies depends on how well others perform in the middle. ergo Leka to the middle is just a symptom that at present our middles are not good enough.
Also Leka is most likely going to be an impact middle forward which means he is gonna run off
Walker, i won't extrapolate on why that would be a good thing.