We now have some details on what Lucas' version of the Sequel Trilogy would've been:
We can blame it on all the hate the media and fans gave Lucas over the prequels that we didn't see it. It sounds weird but it's different and new, not a rehash, I would've loved to have seen it.
These are not the only details, from the art books of TFA and TLJ we can see that some ideas of these two movies were in the drafts of Episode VII. So Disney just took some ideas, stretched it out over two films and rehashed the OT for good measure.
The whills are an idea George has had in Star Wars since the initial drafts and have made spontaneous appearances so it's not something new. Apparently there's actually a reference to the whills in Rogue One.