This is the crazy part: someone is going to accuse you of proposing something "over powered" when the truth is that +60% is still 20% behind a TWF's 1.8 attacks AND THATS IF THEY WERE USING PLAIN +1 WEAPONS... the reality is the TWF has .8 more attacks to get on crit (Dragons Edge and Crippling flames) procs, more bursts, more Heartseekers, more Lightinging II strikes, more neg levels' and stat drains, righteous red augment procs etc. etc.
This fundamental flaw in SWF has not been addressed by the Dev's or responded to when brought up on the PC forums. All putting a buckler in your off hand does is nearly half your DPS potential...