Why do they have to look like something that came before? An 1858 Remington doesn't look like an 1851 Colt, not even the same caliber, but people didn't turn their nose up at them because of it.
I've got reproduction Walkers, 1851's, 1860's, 1861's, etc., but I've got a fair supply of ROA's too, and love to shoot them.
Since this picture was taken, I've acquired two more blued, 7 1/2", fixed sight models.