Again, I think the intent is to increase certainty. it doesn't have anything to do with difficulty, except maybe by increasing it (after all, whatever the special recharge abilities are certain to begin with). So, if you gave all enemies a recharge 6 crit (again -- no one has said this exactly is what they are doing) they would "crit" once for sure and pretty probably at least one more time ina 3 or 4 round combat. That is a tougher fight, not an easier or softer one.But how much do crits really impact any given fight? I doubt I roll 20 attacks in most fights, so on average I'm doing less than 1 crit a fight. Do some fights occasionally have more than one? Sure, but those are few and far between. The increase in damage to any given fight from crits is pretty minimal when you average it out. If they are accounting for that by softening encounters, then they really shouldn't be softening them up very much, which means that encounters won't get all that much harder if they remove crits.