Oh, I agree he provides some flexibility in giving Vlahovic games off and he can slot into that 9 role with Yildiz and Chiesa flanking him.
Honestly, I will agree that is a good argument to getting him. He can play in the AM/SS role in a 4-2-3-1 just behind Vlahovic and almost gives us a pseudo 4-2-4 at times and he can also be the #9 when we need to give Vlahovic a break or he is hurt. That is a massive flexibility that Soule does not provide.
However, I do think putting him in the AM/SS role or alongside Vlahovic is him taking Yildiz's best position too.
I think Yildiz has shown enough that I'd even like to try him in the vice 9 role if Vlahovic is tired/hurt with two flanking attackers.
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And thats the benefit of Soule is that RW is his natural role and we can play all of Chiesa, Vlahovic, Yildiz and Soule in their natural positions in a 4-2-3-1 formation.