Okay so I just read all the posts and here are my thoughts:
If you can talk to people in champ select and all 3 of you take revive it can be a huge advantage. Typically though this will only happen in Prems, either way it should work decently. here are the three possible situations I can foresee it being really helpful.
1. Even if your team is dominating the other team, you can be significantly more aggressive knowing that your entire team has a back up. I am not saying that tower diving is always the best choice but with revive it might get you a kill and essentially a super fast blue pill.
2. Also, if your team is doing poorly and you manage to all get aced, all three of you come back and at worst from the team fight the other team is a t half health. Now it is incredibly easy to take the offensive, especially if your team has improved revive.
3. Lastly it's a team fight and your that champion that dies within the first ten seconds, usually you would be mad because you were stun locked and contributed almost nothing to the group fight. But you instantly revive and because TT is such small map make it back in time for the end of the fight or to play cleanup crew and get an easy kill or two.
Allot of teams will also play defensive after the ace/full team revive combo which will give you a chance to farm up on buffs, and minion kills since your team might be a little behind in gold flow since you were just aced.
I suppose it doesn't really matter since they are changing revive soon, but I believe given the whole team has it and you save it for