Qwiss Trossard is bad in the middle, hit and miss on the wing and at his best as a striker. He can replace what ever Eddie is giving us, easy.
Again, Eddie contributed with goals in 3 games. He scored 2 goals in august, and the hattrick in October and nothing else. He went on a 15 game run of not scoring and a 7 game run of not scoring, in the same season. We will not miss him even if we don't buy anyone, never.
Once Havertz made his move to striker...it was over for him at Arsenal, in the last 16 games of the season he got 45 minutes of game time, all together, and was not used for 10 games, including the last 7 in a row. Arteta is done with him.
Nobody is saying give him out for free, but I'm ok with selling even if we do not bring anyone in, and I'm pretty sure Arteta is as well. If he stays here, he gets 200 minutes of game time next year, tops.
In terms of contribution all 3 you mentioned were bad.
Eddie got 1072 minutes and 5 goals - 2 assists, Jesus 1483 4 goals and 5 assists and Martinelli 2029, 6 goals and 4 assists. The thing is, Martinelli and Jesus had the worst year of their careers and Eddie...well, he had his best ever, and he was still worse then them.