I'm on board with anything that reduces inconsistent results, though I suppose now I'll have to bring lunch and dinner to a tournament.
Interestingly enough, if you work out the math...
5 Rounds Swiss Top 8 Single Elimination 65 minute rounds (old style)
Assuming you win the whole tournament, you'd play 5 rounds of Swiss plus 3 rounds of elimination which is 8 hours and 40 minutes of Netrunner.
5 Rounds Swiss Top 8 Double Elimination 65/35 minute rounds (new style)
Same assumptions, you now play 4 rounds of double elimination, you play for 7 hours and 45 minutes. Though, if someone goes into the lower bracket in the first round and then rise to the finals, they will have to play 6 games which would extend the tournament out to 8 hours and 55 minutes.
So, on average, the new tournament system will take about the same amount of time as the old system and possibly the tournament day is actually shorter by 55 minutes.
As for the Triggering Actions, I'd imagine triggering the action occurs after paying the cost, but you can't initiate an action unless you first have the means to pay for it.