In that case, i agree with you entirely.
What do you think of how we handle berardi ?
I think we're doing well, him staying at Sassuolo this season is excellent for his development, especially since he is their main player (and penalty taker).
I'd wait until the summer to decide if he is ready to join us next season. He has started this season very promisingly but he is too raw at the moment and far from ready to come here. If Sassuolo stays in Serie A, I'd consider letting him stay another year unless he is very impressive until the end of the season and finishes with something like 20 goals+assists.
From what I have seen, he is not a traditional winger and is more of an inside forward of Marco Reus' type. He could definitely work on the side of a 4-3-3/4-2-3-1 or as a second striker in a front two.