I didn't watch the game, I'm not sure if you did. But from what I can understand, there was a lot of time-wasting.
In this case it is annoying. I despise Spurs. However, it's very frustrating if your team is losing and the opposition are doing whatever they can to run the clock down. We've all been there.
So unlike a lot of rule changes, making the time added on more accurate is actually a pretty good one.
See us vs Newcastle last year, where they playacted their way to loads of added time, allowing us to score the winner in said added time.