"Skating force may not be an important factor in tracking error."
To unpack your statement a little bit, skating force is in part directly proportional to tracking angle error. The term "in part" enters into it if you are using an offset headshell. With no headshell offset angle, then skating force is directly proportional to tracking angle error. Think about it.
Really, why would we care about Ikeda-san’s opinion of the Viv? Can’t we form our own opinions by listening to it? He could tell us about its technical "shortcomings", to the degree the design differs from that of any conventional overhung tonearm with a headshell offset angle, but those are obvious.
Why does exotic audio gear cost so much these days? Probably because the sellers think enough of us will pay their prices to justify their costs and need for profit. But this has nothing to do with good or bad performance, in my opinion.