Another way of seeing V/M's relative weakness in the freedance is here....
http://www.isuresults.com/isujsstat/phsdfd.htm
The three times V/M held the world record for the freedance were at events where they then immediately had the W/R taken from them by D/W, two times of which by significant margins. They have never held the W/R for the freedance for any extended period in their whole career., i.e more than ten minutes or so.
I would have expected a team that was called the G.O.A.T to have held the W/R in both the short and the dance of the IJS period for an extended period. But of course they were never consistently at the top their whole career, part from in 2017 when they win every event they entered, whereas D/W were consistently at the top for two whole years, and another whole year, so it's no surprise that that should be reflected in the FD world records.
The were of course very good at the short dance, but they didn't hold the WR more or for a longer time than D/W, who held both the Freedance W/R and the Shortdance W/R for extended periods (from 2011/12 Gpf until retirement in their case for the sd, with a few minutes where it was held by V/M at GPF 2013/14) (something that P/C have now also accomplished, and they didn't even have to hit all the levels because their overall skating is more highly rated overall by the ISU judges). I don't think one can say V/M were the greatest under IJS even, with that sort of record.
I'm not really considering body of work when I look at V/M as G.O.A.T or the IJS era, because for me that's a question of taste, and they are generally not to my taste and it would be unfair of me to do so.
Not considering personal taste I rate both G/P and T/D above them and them about equal with D/W and other pre T/D ice dancers. Taking in to account personal taste, P/C, the Duchesnays, D/W and K/P would all o'erleap them.
if it were Best of all Time I'd have T/D and P/C equal, wherein I was judging solely the quality of artistic experience a team had to offer, and not taking in any competitive statistics. I'm also happy to make that judgement now despite P/C only having completed their first quad in senior and still being competitive, because I do believe there is such a thing as quality.