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Kills revive for dominion, let's face it, the only place it was ever used regularly. Unless they reduce the cooldown from 9 minutes it's never going to be used because other summoner's can be used to prevent death far more often.
The only reason it was used in dominion was because it was highly effective at capturing or defending at risk points with a quick revive and run up to point. Now, it's far less useful, maybe not dead, but now, it's very difficult to use this reactively and smartly to save a point unless you have a super mobile champ like kassadin or leblanc.