Good stuff. I like the changes to the schedule - moving the transformational aspects forward is a great idea (lets you playtest earlier - our team did this as well), and I also noticed you have more extra time allocated around sprint 5 (and a dedicated time block for playtesting).
Your Jira looks good - appreciate having actual descriptions on your "user stories"/features.
Asset list also looks useful for the art team, but I might ask why use a separate system (excel sheet) rather than including assets in the Jira? E.g. you have retopo happening at the same time as "variants greybox" - what if you discover you need another model or asset while greyboxing? If you know ahead of time each and every asset you will use (looks like you might), then it probably isn't that big of an issue.
Only small suggestion I have is to make sure your greybox is set up with actor blueprints so you can just drop in/replace the greybox with the final art when complete (opposed to going back and re-placing every object).