I have, repeatedly. Tosun was lacking in every area, but the idea of Tosun was the correct one.
Whereas Lukaku has worse technical ability than Tosun but is so ridiculously better in a few aspects of his game that, as a 'glass cannon' type of footballer, is far more effective than Tosun.
So an 'improved version' of Tosun - like we see with Calvert-Lewin - is by several magnitudes the superior option as a footballer to Lukaku. Unfortunately, Tosun wasn't it, but if he was in Italy now (or Turkey, as he is), he'll look a world beater at the level he's at.