In short, the Ret can revive a disguised Disguiser as normal and they won’t know it’s a Disguiser. Now, I know there are people who will say “better to remove Ret entirely”, but aside from that discussion, what do you think?
This has been suggested several times beforehand. And has been rejected each and single time. Retributionist needs removal, as you mentioned people will say because that's the best possible choice. That is the only thing which can be done with Retributionist. People have tried for years, but none of the changes or reworks have been good enough (unless Parallax's TPro rework is good, that's our last hope).
RNG is never good for any strategy based game. Please learn the definition of what that means, especially if you're one of the people constantly defending it.