The parts that are being reworked have been talked about for weeks, both by the developer and users here.
As for needed reworks - Said it before, but in my opinion he's not doing himself a favor by going bigger with every Chapter. Ch05+06 both had the issues of being in need of rework/finishing touches/proper endings, which I think was due to CG biting of more than he could chew in the time he gave himself (See DLC's for Ch05 - He's had to add two updates in order to finish the Chapter plus reworks as he's going bigger and bigger). Proper quality control with time to fix things is needed no doubt, but I'm guessing his proofreading/playtesting team aswell as himself didn't have enough time to make the required adjustments happen after he's (prematurely) announced the release date for Ch06. That's just my uneducated guess tho.
I'll say that again aswell - To have a more manageable project,
toning the amount of images down to ~250'ish per Chapter would prolly do wonders. But that's easier said than done when you have a vision in your mind in regards to what you want the finished scenes to look like, how you want to tell the story... etc. You work on a scene and suddenly you realize it's turned into a monstrosity in terms of size and time.
Many developers end up creating bigger and bigger updates every time, which I think at some point goes into diminishing returns territory. It's his game and his decision at the end of the day, but me personally I hope this isn't spiraling through the roof.
Anyway... Excited to see the changes for Ch06. Preview images of Anya and Maki looking good!