Yeah, FoD is definitely a weird one!
I had considered putting the Ahsoka Training episode of TotJ within the finale (where it pays off), but I think it’s most useful as that pacer between seasons one and two, where we get to see her going through a bit of a maturing transition. It also works well as a bookend for some other story (or stories) due to its fragmented nature.
And Forces of Destiny, as you say, have some decent value but do throw off the tone a bit. I originally planned to mix it with some more content from the existing Tartakovsky cartoon, but that wasn’t vital to the plot of TCW:R (and also itself tonally unique), so when I realised I had TotJ to use as a bridge that became a natural marriage to become an odd, experimental little bonus episode.
I hadn’t considered post-credits, but I think in this case they wouldn’t quite work, mainly because people aren’t really expecting them, and one of the major goals of this project was to manage the users’ expectations (hence my comments in the spreadsheet, etc).
Either way, thanks for your feedback, and I’m really glad you enjoyed the edit and the original content!