I can understand people not liking the designs, there's plenty of of canon designs that are terrible. It's just that it's now 5 years later and people are still beating the same horse.
as for the revealing info... are you saying he cant as it will screw up the future of this jj verse? that (to me) makes no sense as that universe has no future at present. i mean the new reality was created at the point in the past of the prime verse where the nerada appeared. at that moment a new reality and new time line began so there is no "tomorrow" to mess up.
Of course it has a future. Just as we have a future. If we didn't, there'd be no tomorrow. Time isn't physical, it's perception. Past, present and future exist all at once, it's the only way it can work. Saying that there is no written future is the same as saying there is no written past. Which is ridiculous, because we know otherwise. The only difference between past and future is that we've perceived one and not the other.
It's like pausing a move half way through. You've seen the first half and know what it is, you haven't seen the second half yet but know that it must be there for you to watch.
When Nero destroyed the Kelvin, it made a new, different timeline. The timeline would then be altered again when Spock came through years later, because it would be an outside influence. The temporal directive would still very much apply.