Looking at KEK-10, it seems logical to think this weapons is supposed to be the “balanced” SMG : Jack of all trades, master of none. A DPS close to the Crotzni with a RPM close to the Hochfir, and what seems to be a stability close to SMG-9. However when all those stats are too much above the average, there’s an issue.
Last time I used the KEK-10, I llitterally murdered everything that crossed my path, at any range. It’s nothing like the Blishlok I am used to (I play BL33 on Fletcher a lot). That gun seems to have no drawbacks at all, has a DPS above most SMGs, it’s almost an upgrade of any SMG you can find. You have a better DPS than Hochfir, and there’s no reason to choose SMG-9 and Blishlok instead of KEK-10 if you can pick something between those three. Choosing between Crotzni and KEK-10 may be a slightly trickier choice, but you would pick KEK-10 anyway as Crotzni is not as powerful as longer ranges anymore (precision nerfed).
KEK-10 is easy to use and performs much better than any other SMG around at the moment. Meanwhile, you have the Blishlok that is arguably the hardest SMG to use, and isn’t even as rewarding as any other SMG available.
IMO, this one should be made harder to use than that. Giving it a bigger recoil, and removing a bit of the clip should do the trick. Like this, you would pick SMG-9 or Hochfir for better stability and easier use, and KEK-10 if you need a bit more punch, with a greater range than Crotzni.