Acosta is very good, with a physical training to increase his pace and acceleration he will be a monster. Too bad he has 14 heading with 2 jumping, that's wasted points, but still.
Solomun is awesome.
Not a great fan of Demir (very physical, but average teamwork and determination, two key stats, and I hate long shots), I think you should make him play a season to increase his value and sell him for 30-40M
Im thinking of loaning out Acosta because he was injured for 3 months at the end of last season and his progression has declined a bit
Solomun is becoming unstoppable at the moment
Despite Demir's mental stats not being great he always plays apart in any goals scored he's also become a favored person within the club.