Yes. My understanding was Amy & crew had a contract dispute changed the story line in the end of season 6 and tanked the story line, that the writers took half of season 7 to right the story line. They tried to get another half season out of the actors but again from what I understand it was Rory that gummed that up not wanting to continue. Though I believe Alexis is coming back for this, don't think she did much since Gilmore Girls unlike Lauren Graham or Melisa McCarthy have.
Too bad it took so long for them to get most people together to finish it off but yes Amy will be doing it but too late for Richard but Emily has said to sign on. It is my understanding that Sookie, Melisa McCarthy won't be joining the cast. To be Netflix.
From Wiki
On January 29, 2016, Netflix and Warner Bros. officially confirmed the revival, tentatively titled
Gilmore Girls: Seasons, stating that Lauren Graham, Alexis Bledel, Scott Patterson, Kelly Bishop, Sean Gunn and Keiko Agena are set to return.
[5] Yanic Truesdale confirmed his return on Twitter later that day.
[47] Filming of the new episodes is scheduled to start on February 2, 2016, with Amy Sherman-Palladino and Daniel Palladino also returning as writers and directors.
[5]