Mostly yes. Outside of the rare sort that falsely rated him Admiral level, over the years, Marco and consequently the rest of the Whitebeard Pirates have been constantly underestimated and downplayed time and time again. They still are, for the most part. People used to actually say that WBP's having 16 commanders meant that their top guys were much weaker than the other Yonko's. And the matter of Marco's AP. Back in Dressrosa some would say Marco is weaker than G2 Luffy and would lose to him.
Their recent showings has done a lot to boost the WB pirates. No-one can rate Ace as a Snack level anymore. Izo who was nothing special in Marineford, vastly over performed expectations in Wano against CP0 and he isn't even one of WB's top 5. Though some still downplay the feat, nerfed and handicapped Marco holding back King and Queen is a huge feat in his favor. At the very least, he's proved on panel he isn't just all regen.