they said they shorted the duration of embrava and pd because it's no longer a two hour ability
When have they ever, ever said this? The only reason embrava and PD were ever nerfed were because they were ridiculously powerful. You obviously have no idea what you are talking about. The abilities are balanced based around the idea that you can only use them once (and twice if you're really stretching) per event, barring using special abilities and revitalizers that come from that event itself. The timer was shortened because of they way they are now designing their events (With the intension that you won't play them long enough to get more than one use out of the SP ability), it has nothing to do with an ability's timer affecting it's potency or whatever the hell it is you are trying to make up.

If they wanted to implement "I win" buttons on a 24 hours timer they would've done that.