Klingons have always been fucking with themselves genetically. The outcome from their level of advancement inevitably leading to a Eugenics War, like the humans did, had a very different result. It's not brought up too much in the show(s) though.
At this point they should be less freaky looking. Lore wise they should be almost human looking. Correct me if I'm wrong anyone that could get through Enterprise if there was Klingons in that.
Honestly that would have been an interesting plot line. Humans being 'bigoted' towards Klingons for their acceptance of genetic manipulations because of man's history of fighting over those scientific pursuits.
I keep hearing about how diverse the cast of this show is. When the best thing you can brag about is you managed to check a few boxes of politically powerful groups you may not have that good of a show.
The first Star Trek was very diverse - especially for its time. Now the so called "diversity" is just done to gain points
(Klingons were in the first episode)
Klingons in Enterprise were the same as TNG/DS9. BUT, the human looking klingons didn't happen until after Enterprise took place.(well, started near the end of Enterprise) The Klingons got the idea from or captured some augments, then tried to reproduce the results in themselves, with the result of losing their physical appearance.
and btw, Enterprise was actually one of my fav ST series. Having said that, the first season was a tad dry as it was all about just learning about deep space travel and getting the know the crew. The second season was pure awesome, and the 3rd season couldn't live up to the 2nd. Season 2 was possibly the best ever season of any ST series.
There is a DS9 episode where they go into the past, and Obrien asked Worf what is up with the Klingons not having any ridges.
Waitress: "All right. You boys have had enough."
Odo: "Mister Worf?"
Worf: "They are Klingons, and it is a long story."
O'Brien: "What happened? Some kind genetic engineering?"
Bashir: "A viral mutation?"
Worf: "We do not discuss it with outsiders."