First of all, it’s expensive, limited fodder. Not exactly easy to get.
Secondly, as a smoke skill it only takes effect after the first combat, meaning you can still be killed outright before gaining the effects.
Third:
Always has been, but diminishing returns. So you can do it, but outside of bonkers cases like B!Ike you are usually better running something else.
The smoke skills are good, and I really don’t like the direction they’re taking the game in terms of powercreep, but they aren’t explicitly broken or anything like that.