... From the complaints I'm seeing so far being clustered around 140+ content, it really sounds to me like they forgot to adjust the MOST IMPORTANT VALUE in the formula.... Stats gained per level...
I've been calling for an adjustment to physical evasion for mobs for a long time now due to how the highest level stuff was far too evasive to be reasonable content. (I tend to focus on the highest level "Apex" mobs, particularly in Ra'kaznar zones.. The stated point for adding the Apex mobs originally was as CP party fodder, but how many CP groups can expect to have 1500+ acc w/o access to zone buffs like vorseals?) Heck, even a bug report I filed was accepted about Apex Bat evasion, so there is at least some sort of acknowledged potential problem.. I think it's rather safe to assume that macc/meva function similarly to physical, so it's extremely likely that if the only mobs we are having issues sticking stuff on now are all in the 140+ range, that it is primarily due to the level difference.
I've suggested either reducing the lvl+1 value if they insist on sticking with a linear formula or changing to a scaled formula with lower values the higher the mob's level gets for physical eva, but I've always had a feeling that meva might also need similar adjustments. It's just so much harder to test for meva/macc than physical due to no /checkparam, so I've never lobbied for it before since I couldn't come up with any verifiable values to argue with. ^^;; Sounds like both may need to be re-examined at this point though.