I understood some prefer blue vs blue all the day like in legacy, but it is vintage and kicking shop out of the top tier won't make the meta 'healthier'.
I suspect, though don't have hard data, that many "dissatisfied" vintage players are actually legacy players who started playing vintage out of prestige and to look like cool kids. As result, these players use blue decks because most of the cards in those decks are transferable between vintage and legacy. So choosing between adopting to a new to them format or insisting on changing the format, naturally they prefer the format to be changed to suit their preferences. Therefore, there is a notion that the Workshops deck is too strong and unbearable for the format.