You might have a point there. It may be due to the way people assume how dinosophonts will develop "in the future" of an alternate Mesozoic, and apply the trend of reduced teeth in potential d.sophont ancestors to their line of speculation.
Okay, I know almost zilch about biology, so this might sound newbish, but . . . how are those feet and legs supposed to support that body? They look a bit scrawny. Again, I 'm a newb who's just wondering, not criticising the logic behind it.
Still, it seems like a great design and refreshing to see people refute our inherent(?) humanoid bias in designing creatures.