I have a Kuzma XLDC (4pt and ref 313 arms) which I am very pleased with. I don't think it lacks flow - Ked has heard it a few times and I am guessing it is not his cup of tea, he has not actually commented on on the sound of the TT (probably out of politeness!) - we have usually been comparing carts or a phono stage.
I have only heard it in direct comparison to sme 20, 30 (construction easily as good as sme) and LP12. I have heard the M and a Tech das and did not feel the XL was lacking in any way. In fact I missed the weight and authority of the XL although I was, of course, listening to them in isolation in totally different systems to mine. Kevin of Definitive audio likes the Kuzma a lot.
Ones listening tastes also come into the equation - when playing vinyl I listen to a lot of 50s and 60s jazz, some rock, classical piano, the XL excels here
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All TTs have to interact with the arm, cart and phono stage. Ancillary equipment will always infulence the final sound achieved. Needless to say there is no universal TT soultion otherwise the luckier forum members here would not bother with multiple TTs.