I also assume the OP is referencing the away goals rule, and yes, this has already been removed.
Personally, I think it's good that it was removed. There are quite a few reasons why I was against the rule, but just a couple 1) It just feels unfair that a draw over two legs can result in a winner. If a team wins the first leg 3-1, and then loses the second leg 2-0, then it's 3-3 on aggregate, and neither side should be perceived as having "won", and more importantly 2) If it's level over two legs, and the match goes to extra time - it's only the second leg that goes to extra time, not both of them... so the side that's away in the second leg just gets a huge advantage... if both teams score one goal in extra time, it means the away team "win".
No, as for the second point, this rule has never worked in this way - if extra time started, then if there is a draw, there will be only a penalty shoot-out, neither team received an advantage.
I think everyone is happy about the abolition of this rule. It was initially stupid: it was introduced because it was assumed that the away team would play more attacking football, since goals are "cost" expensive. But in reality, the home teams started playing more defensive football because of these considerations. And instead of increasing entertainment, the opposite result was obtained.