Well I am not a judge but I think, that he is very promissing, too. All the right colors in all the right places, no single white/black/red feather clear cockoo strips and yellow beak and feet. He will hopfully put on some more weight and broaden/deepen his chest a little. With the wings I am not sure, since he is in motion on the pics. Maybe you can put him on a table and see if the wing line is parallel to the back line. His comb and his wattle will perhaps grow a little bigger, too. But that is not a problem as long as the comb does not lean to one side and the comb-base broadens, too.
A side note: We always look at the roosters but to find good hens with the right colors, a salmon colored chest, golden neck feathers with clear cockoo dots and a compact body with a large egg belly is as difficult to find and as important as a good rooster. If the coloring of the hen isn't good you risk the autosexing funktion and if her bodytyp is wrong you may have problems with the eggsize or health.
And o/c I am happy to hear that not all birds have problems with hot summers. Remember the breeders here can not select for heat tolerance. Hot summers are an exception.
But you can select for heat tolerance the same way you select for body type and color.
I have 3 hens that have everything! Size, color, cuckoo dots body shape, large egg belly etc. I also have 2 very young pullets out of those hens and my last Rooster Jackson that I have high hopes for. I need a NICE breeding rooster now to seal the deal for next spring. All I have is a little 5 day old Roo chick and it will be months before I will be able to tell anything about him. Where is a nice breeding Cock close to middle Tennessee?