One of the best things ENT ever did was explain the reason for the differences between TOS Klingons and movie/TNG Klingons.I really do think the TOS style Klingons were scarier than the turtleheads of the films, TNG, DS9 and VOY! Maybe it was their heavy brow and sneer rather than thicker skin? The Conker head look in DSC is totally not for me either! Their similarity to humans and their sneakiness, their honour came much later! Although I'm no fan of ENT I did like the Klingon two parter explaining their changing even if it could have been done in a different and in better way! When the first Klingon became affected with the virus I could see the old style features and that made me sit up with this show for the first time ever!
JB