It might just be me but I find it easier to get Legendary cards now. Yesterday, I finished off 20 Legendary duplicates for Emile and Sarah, just ready for Level 6 cards. But the Epics would still take more longer. And it helps that drop rates have improved recently with more Legendary, Epic and Rare percentage. At least Level 5 cards to get 20 more, it won’t be necessary to constantly upgrade cards from Level 1 to 5, which takes a short while.
I think it may have been RNG and some sort of placebo effect. It may look like getting more of certain Level 5 card, when it might just be RNG makes it seem like that. It would be harder to say the same thing for Epic, Rare and Common because they have multiple cards, and Legendary is just one or two (Cole).
Say Master was 10% Legendary, 20% Epic, 40% Rare, 30% Common. For example. A character could have 1 Legendary and 3-4 Epic. That means Legendary card has 10% chance, and one of Epic card being Epic Score Boost would have 5% to 6.67% chance. Maybe if there’s 4-6 Rares, that also means 6% to 10% chance for a certain Rare card. So Legendary is high up there, relatively compared to others on Master. Not sure about Incon, but should be similar percentage for Legendary and Rare. It seem getting certain Epic would have lowest percentage of all.

