This is not a direct nerf monks it is a bigger one to monks then Paladins and fighters. This is simply because Paladin's and Fighters will be able to get STWF and Monks won't as they count as a 3/4 BAB, even if they have full BAB when using monk weapons. Therefore fighters and Paladins can get 20% more off hands then monks can under the purposed system. This does bring an imbalance to these full BAB (well at least when monks are using monk weapons) classes. Any way you look at it a Paladin and fighter can get away from this with a (less then, due to offhand being only half strength bonus) 5% decrease in attack rate well monks get away with 15%
without splashing into another classes . Though this is not intentionally a nerf to monks directly, it becomes a larger nerf to monks then any other class due to the inability to get STWF and the 30% decrease in offhand rate you speak of decrease you speak of. A monk's 15% drop in DPS is greater then a 5% drop in another classes that has greater DPS to begin with.
To sum this up: It is a greater nerf to monks then Paladins and fighters because monks would be unable to get STWF or 100% in offhand while Paladins and fighters can. Hence my suggestion in an earlier post to increase the chance of a monk gaining a 5% increase in chance of hitting an offhand every 5 levels with monk weapons (a.k.a when a monk has full BAB like fighter and Paladin). It requires you to be pure to get that 100%, and brings monks to only a 5% decrease in attack and DPS. It makes them nearly equal to Paladins and fighters in terms of nerfing.
Note: STWF will at least require 15 BAB which monks would need to be 20 to get which isn't a place where they can get feats. It is more likely that STWF will require 16 BAB in which case monks won't ever hit it, even if they are
at 20 BAB using monk weapons
P.S: It is true that Tempest rangers are being nerfed more then any other class but they still have a nearly equal attack rate to the other full BAB classes, though I believe that they should have 110% on main hand to make them equal to other full BAB classes in that regard.
Edit: upon reading Solars posts I would like to add that there is also the 15% less in ki regen. Also that the 15 BAB requirement was stated by a Dev the first time they wanted to add it in and therefore the BAB requirement we can rightly assume until Devs release information of anything different.
Second edit: found the post
http://forums.ddo.com/showthread.php...52#post1448752