Honestly, I prefer him, because he is a low risk investment and he could actually be a very useful player in the long run.
It will be exciting to splash big money on Gotze, KDB. Isco, Silva and even Draxler, but if they turn out to be a massive flop for us - this could be devastating for years to come.
So, having Saponara as a back up/competition to Pereyra is a wise decision, when we can't have low risk classy investment. We already did a risky business with the signing of Dybala.