I agree, to a degree, but then you have strikers like Costa, he scores goals and he puts himself about, I wish Lukaku was more like Costa, but Costas like what 28?
Costa is also an exceptional talent and one of the most complete strikers out there. He has vision, ability, good movement, strength and tenacity.
You quoted before I amended my post, but I went on to mention that if he improved other aspects of his play then arguably he could score more.
Maybe comparing him to Costa is fair in the long term, as it's what we may wish for, but now it's slightly unfair as you mentioned.
With regards to Rom, it would be fair to question sometimes his ball control due to his clown shoes. Again hopefully that will come in time.
Also, when he first came he bullied defenders with his stature (almost Drogba like). It would be fair to question if he still often does this?
Yet, hopefully they'll all come with time, experience and some good coaching. As long as he keeps scoring though, that's the main thing.