Transformers being a clone is largely irrelevant. F&F is a similar kind of attraction. It's a giant box with screens in it. It doesn't require the façade work Kong did, and doesn't have the large scale AAs that Kong does. F&F will take longer than TF, but it's still not 24 odd months away.
And they're drilling for foundation pylons already, so they've moved past demolition. As far as I understand it, F&F has always been a Fall 2017 attraction. I don't see any reason why we shouldn't believe that's still the case.