The best centres are lanky like Crichton, Inglis and Toopi, then there is a tier of more direct guys like Staggs, Timoko.
If you accept that then
Leka is unlikely to be a top tier Centre unless he totally changes his shape. So probably more risk that you totally mess up his progression if you try change him.
I get what you are saying although
Ruben Wiki was built and traded on being a forward like build.
Ruben looked like a back rower his whole career physically and I distinctly remember thinking he is in the wrong position when he came on the scene but I was wrong, he was fine, straight hard running player.
The thing that we need to remember is that
Leka is a unique case.
There is no player like him, no backrower type guy with a step like his, the pace, the power, and a decent motor, and an emerging defensive player that is on par with the standard for a genuine forward.
Actually.....I have found a player....after months of not seeing one from zillions over billions of years of watching league....there was one guy like
Leka in the 80's....Ellery Hanley (they are not exactly a perfect comparison but both subjects are just so unusual).
Hanley had way better ball skills and vision than
Leka as a genuine back, but became a lethal running forward and ripped the Winfield cup to shreds his first season.
The point I am making, is that I guarantee you if they went that way, that
Leka would be a killer center, he has the defence, the pace, the footwork, the fend, what they would need to school him on is the pass....or at least a passable offload. But hey, when you are that dangerous short passing will do.
One on one vs a fullback in the open,
Halasima is going to win more often than not eh....we have seen that twice now...boom step...step gorne.
By the way I am not advocating for
Leka to go to the Centers (same reason as you, the jeopardy with messing a guy up moving them around).
I just think he could piss on it with a two seasons exposure and some help at training from probably Mr Wiki.
Probably play
Leka on Metcalfs side and get those two becoming training twins 24/7/365.