I feel Konami didnt experimented enough with MD: they had a carte blanche to experiment and change broken cards with erratas and try new formats. Some Events are very, very good but others shit the bed so badly you dont want to play them because it ends as regular ranked with slightly tiny difference.
I get the whole "lets players enjoy a format at full power" but most people at least want some hits to keep things fresh, Tear, SE and now Malice long streaks made things boring.