Again, it's not a prejudice. I am not saying he is a bad actor or anything. I liked him since he was "Dean" in Gilmore Gilrs. He just doesn´t look that the Harry in my mind. I am not saying he has a baby face. Young is ok for a wizard. I am saying he looks like a good kid. And Harry shouldn´t.
And I didn't get the impression Harry is becoming "wider" but all the opposite, I thought he looked very slender. Muscular yes, because he runs, do parkour and all that.
So, stop saying that without SN there is no reason not to like him. We are telling you our reasons, he doesn't look like the Harry we imagine. Of course you are free to disagree with that and think he is a very good choice. That is ok, we all have different ideas of Harry, after all. But it is not ok that you insisted in accuse people of prejudiced when you yourself accepted we have reasons here.
For me, the only thing "in favor" of him as Harry is his height. I don't believe that is enough.