When you say someone who knows Star Wars inside and out, are you referring to the creators trio under KK, Favreau, Filoni and Rian johnson?
Because the trio knows Star Wars inside and out, it was Abrams who **** it all in the sequel.
KK mistake in the sequel was trusting Abrams and fear the mob mentality of Star Wars fans.
Actually the trio represents parts of George Lucas mentality as a storyteller:
Favreau: is the small budget tipe of western of Star Wars
Filoni: is all about the mythology and magic of Star Wars
Johnson: is the real world things in Star Wars and have his feet on the ground about the mythology
Its ironic because if you look the OT, Favreau would have made ANH, Johnson ESB and Filoni ROTJ. In the PT it would be Johnson TPM, Filoni AOTC and Favreu ROTS. This is a assumption based on the chacarateristic of them as creators.
If you combine each of them you have a Star Wars masterpiece, and there is where Taika Waititi enters.