Avo to FB is probably a bad idea. Barrett couldn't decide what to do with him and spent his tenure screwing him over by constantly moving him. We don't need a return to that. He's a young kid with a lot of talent. He needs stability, to grow in to a role and build confidence. He's starting to really find his feet at Centre and should be allowed to continue, unless there are plans for him to play FB long term, which seems doubtful. That's not to say he wouldn't do a job for us at FB, just that it's not what's in the best interest of the club's future or his.
We are lacking cohesion but, if we absolutely HAVE to break up our edge combinations, I'd move Kiraz to FB. Kiraz seems more self possessed than Avo and in less need of development. He's good under the high ball, has 0 qualms about hitting the line at speed and never gives less than 100%, so you know he'll always be there for support play.