To go into more details, it seems as if this tool has not had an update in forever. As you guys know we have that area of "modding tools" why don't we try to get our own versions of those mods and put them in that 360rev tool? But like I said is it dead now that xbox one is out?
Like B said it isn't dead, and there are still many tools to come out for the 360 as its gunna be running for a while with new game releases. XboxOne games should come soon, when the method is found.
Like Killervidz said, there is still a lot of tools to be released, and once there is a method for Xbox One Game Saves, I'm sure the dev team will add them into 360ReV.
Bear in mind games for the xbox 360 are still going to be developed for the next 3 years,so there will be alot of new features/tools etc on the way as The devs make it,just be patient ; )