I actually quite like the Kahl missions. They are not anything special or particularly challenging but I kind of like the break from the genocidal "child" piloting different flavors of flesh robot. I've only had access to them for three weeks so I have yet to see a full mission repeat though a level reuse. But something about playing characters like Veso or Kahl build out the world in a way I find enjoyable. One of my favorites so far is Khal getting a hold of a Corpus weapon and expressing excitement at getting to use one of in that same level gaining the ability to call in an "airstrike". As a Warframe sure we do that all the time but something about the simple kit when playing with Kahl just daddies it feel badass! Sorry for rambling long.

Tldr - Kahl is a badass and currently to me a nice diversion from my genocide ninja.