Apparently I had replied into the wrong one of the two threads about FRWs being hit too easily.
So, I was responding to the concept of how much a +1 to the lowest FRW is worth. Or to ways to deal in general. Hope that helps. Feel free to ignore.
Of course it can. And if the ranged characters get threatened by melee monsters and have to deal with OAs, the amount they deal with AC will climb sharply. And some ranged characters even invite OAs, etc.
But, there is a reason I said 'semi-reasonable'. As an average for dealing with a group it's a reasonable approximation.
Well, the comparison in question would be going from a 0 to a 1. Which would be _truly_ insignificant, though I rather imagine in this case that's overblown and it's more likely going from a 3 to a 4 or a 6 to a 7.
Much like in another thread where a DM said that the +3 from expertise wasn't meaningful because attacks always missed by 5, the human mind easily turns 'hit 75% of the time' into 'hit 95% of the time'.