Sure, Worf might be somewhat exceptional, but not by that much.
By how much, though? Worf never outdoes Riker in TNG; indeed, there are a couple of cases where he is struggling with heavy lifting or forcing of sliding doors, and Riker's helping hand is absolutely crucial there. Plus, he fights Riker hand to hand in "Where Silence Has Lease", admittedly apparently under some sort of Klingon blood fever, but for all we can tell, that doesn't turn him weak, just stupid. And note how the slim Jadzia Dax evenly fights him on various occasions, and other Klingons in things like "Blood Oath", but is not noted for her strength and is easily bested by a random humanoidess in "Invasive Procedures".
The thing in "Let That Who Is Without Sin" really stands out as a glaring exception. Perhaps one of the attractions of Risa is low gravity?
As for Jem'Hadar personal shrouding, I trust its main use is in keeping the terrified Dominion citizens guessing. Is there somebody behind my shoulder or not? The shroud is useless in combat, or else these warriors would not become visible
every time they engage in combat; possibly it takes way too much concentration to stay invisible during a fight?
So, why don't the Jem'Hadar lurk behind the shoulders of our heroes? The point of such a tactic is that they don't have to - it's similar to mine warfare, where the most effective mine is the one that was never sown, indeed never built. An actually deployed mine or invisible trooper would be an unnecessary expenditure of valuable resources.
If exposing the secret escape plans of prisoners is a concern, then their cell can be bugged by cheap technological means. It's not as if prisoners would be allowed to carry jammers! (OTOH, which prisoner of the Jem'hadar was
not deliberately let to escape?)
Timo Saloniemi