Dual mass fly wheels are ridiculously expensive and heavy. They make the car easier to drive for novices and they prevent harmonic vibrations from reverberating through the chassis and various RMP's.
I had a LFW on my previous BMW. Rev-matching was cake . The gear-lash was horrible. It is my understanding if you change the fluid in the tranny to something heavier, the issue is much less prevalent. The car was also faster off the line. Was much easier to stall... The rough starts in either first or reverse sucked and you'd swear your car was messed up the first time you hear it. Also, you could replace the surface on the LWF. I ordered mine from UUC.
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A Venza just isn't the same as a ZHP.