Ramos really seems impossible with his salary, although obviously a player of that level should be welcome, even if we have good CBs.
Decision making in the final third, delivery to Piatek and a consistently dangerous midfield or wing player seem to me to be the major problems. As well as a lack of depth in midfield. Even now Biglia is fit, Rino only had him, Kessie, Bakayoko and Paqueta (and maybe Calhanoglu) to play there.
We need some genuine threat on the wings and behind Piatek, someone who will score 15 goals a season, and better supply to Piatek. Then some back up for Kessie, or someone better who would put him on the bench. So few goals and assists coming from the wide forwards is the area to fix as a first priority.