Aight, before I start let me say this; I DO NOT HAVE AN ISSUE WITH 4v4 GANKING, I'M NOT A "MUH HONOR" GUY.
Now that is out of the way, lets begin. At the start of the game's life people were annoyed at the unlimited revives a player could have and that they had full hp upon revival which made fast executions in 4v4 game modes a must have lest you leave a lot of DBNO players in the area where your enemy can revive them to full hp. It still persists today, and with the whole 4v4 meta being to quickly melt an opponent by hit stunning them to death it makes it even worse for those who can stand a chance by playing it safe. What most (**** tier) players do when they're forced to 1v1 because their friend has been downed is they slowly tap E on the downed person. This of course, slowly revives the player while also keeping the guard consistent and the player able to counter gbs.
I propose that an animation that removes guard, locks the person in place, makes the reviver vulnerable to gb and has a small delay before you can cancel the revive be implemented, this animation can only be done when out of lock and not in combat etc.