RocktheCasbah I was thinking about this when he came on yesterday too.
There's been a remarkable decline in the directness of Martinelli's play since last time I watch him a couple years ago, and it's probably (do correct me if I'm wrong) because he hasn't been allowed to play to his strengths for so long. He was an awesome dribbler cutting in from the left. And I don't mean dribbler in the pointless sense of a Savinho or a Doku; I mean he did it like Cristiano Ronaldo used to do it once he got wise to what worked and what didn't. Lots of running power, made sure to beat his man, and then heading for the box.
That's exactly the same style that led Gyökeres to score 120 goals in the last two seasons, but I reckon there's a big difference in starting centrally and drifting left to escape markers, and starting isolated out wide. Whenever Martinelli has played this season his job has been to act as a corner angle to stretch the pitch, and it must be horrible for him to play that way. Double marked at all times, nowhere to go but opting for a backpass to someone who then brings the ball back into midfield, and no one thanks him for it at the end of the day either.
If we're not going to get any proper striker as backup to Gyökeres I'd try to convert Marty. There's literally nothing to lose in doing so at this point.