Normally a buff/debuff should have ONLY ONE version, i.e all champs using [same name] debuff should be the same. 1st version of all debuffs based on acc, including Amiger [block revive], it's basic when the game is designed.
Designer then made legendary champs with [block revive], they think [block revive] no need acc. This is 2nd version of a skill, not only [block revive] but a few other skills like ... (I would not expect Plarium nerf them).
Today we see the 3rd version of [block revive], Rotos' [block revive] need special condition to make it. However what I want to say is this 3rd version is lame, stupid design, not working at all. In order to block revive one champ Rotos may need to kill all 4 twice or three times.
All I want to say is: Plarium need to unified all [Block Revive] to the 4th version. That is: All champs' [Block Revive] only work when killing the champs with less than 50% hp, including Rotos, Zavia, Foli, Queen Eva and other 10 champs.