Far away from jumping the gun but if he wants to help himself, and playing for us he quite simply will have to, he has to develop further his game. I'm not saying he isn't and I'm sure it takes time but one thing that most of the strikers can improve upon is the hold up play or playing with his back to the goal, you name it, especially when you're as big guy as he is. You look at Lewandowski, at the age of 29 he's basically mastered free kicks, something he wasn't famous for previously. FKs are, imo, harder to master due to technical requirement, point is, you pretty much expect the same kind of attitude from Rom.
People were (imo laughably) complaining about Zlatan slowing down our play, but he was very well able to hold up the ball 90% of the time when you pinged it to him and bring other players (usually wingers) into play, something Lukaku wasn't known for before but something that can be learnt. For me, Zlatan and Lukaku complement each other very well, here's hoping that those two can play together especially given in how much of a trash form Miki is at the moment.