at 50AC a +1 "to-hit" point is 1% (x)/100
where "x" is your tohit+10.5
at 25AC its only 2% (x)/50 or (2x)/100
<-not 5% as on live where it was sometimes noticable
at 10AC it is 5% (x)/20 or (5x)/100
anything over 50 ac, +1 to-hit is under 1% change (rounding hides this a lot early on)
anything over 100 ac, +1 to-hit is under .5% change
so our buffs or debuffs (relating to to-hit or AC) all become less useful in endgame.. sometimes a +5 planetouched Tower shield (17AC) will mean only +5% gain in defense, for near 50% drop in offense.
Tactics buffs like improved sunder and sunder, unbalancing, blinding, cursepewing or destruction weapons, become unnoticeable for melee..
yet casters will still receive full benefits from imp sunder, curse, neg levels helping spell DCs...
This is not an attack on casters, i like that caster buffs/debuffs still work
Yet this system DOES rob the melee of buffs/debuffs!
Showing the difference between AC and tohit (changed) vs SpellDCs/Saves (unchanged)
Stillwaters