I think what spelled disaster more then +2/-2 was the respawn wave mechanic. I think i counted 4-5 times where i got on the edge of a respawn wave and had a 12 second death timer, however i was the only one that got that kinda luck, because i was killed 3rd or 4th every fight. The rest of our team had the normal 24 second death timers or 22 for feed(talent), and i saw at no point where the first person dying had a lower death timer then 24. Your death timers were 28 and the base if we were both equal would be 26. So the +2/-2 never changed throughout the game.
As the early game/mid game progressed, your team was stronger, but we had a better late game team. I counted 2 times that a top tower was stopped by a zyra revive and the next one was a maokai revive. On the 3rd attempt(where feed revived), you finally went down as you had no revives left. As the game went on with your revives on cd and our revives coming up, it spells disaster if you make too many mistakes. Even near the end when "I" hit a respawn wave to come back top and stop your final attempt to take top, we discussed whether we should revive or not, and if you would've been closer, we would've and the outcome would've been the same. As for respawn wave mechanics, you love it when it happens to you and you hate it when it happens to your enemy. There has been so many games we've lost to BPB/Point Defense, because the wave respawns were good to them and we had members just barely not hitting the respawn wave.
Now as a solution to the problem, it's not easy to change the respawn wave system, as it's a natural defense to prevent base camping and easy 5 capping. If the wave system was not in place, mid game teams would rule dominion and it'd only take 1 really good wipe with tons of garrisans to win the game and i'm not sure if riot will want a game mode like that. In the end it all comes down to execution and how long you can hold 3 points/win teamfights. Around the 150 point mark, your team was already starting to lose their mid game strength and our late game team was starting to kick in and we finally at 23 points took the tower away from you on the 3rd winning teamfight. As a winning team, you always know that eventually, your going to lose that windmill when their revives come back up and should always be prepared for it and not be surprised when it happens. Reset, replan and stay calm. Your last 200 points of your nexus were just gutted out from under you as we layed seige and our late game kicked in. It's OK to have 2 towers, as your nexus health doesn't drop by very much and gives you all the time in the world to rewin the game. If you want better snowball mechanics, SR is the place to be, but here in dom we love to always have a chance to win no matter what and comebacks like those are good ratings material for riot to one day advertise.
Welcome to the MLB where you can lose it all in the 9th inning if you don't stop their offense when it really counts. GL to you guys in the future and we hope to see your rising skilled team some more.