Yeah, it has always crit as far as I know. Did they get rid of the CC reduction and add movement speed reduction? That almost sounds like a negative impact, but I'm not in the PBE.It always did crit on the bonus AD unless they changed that.
Do you mean it should not? It could easily stay if Riot just leaves it in, and it's available to both teams. It's banned in ARAM though -- not sure about Dominion.Guardian Angel cannot stay in this game.
It seems like a good item for teamfights, but a lot of the time with mediocre players, the person who died just gets mobbed by the crowd who kill him afterwards, after his team has fled in terror -- like happened to TSM's Olaf.