The Bow thing is definitely not worth including a complete side arc.
With the training sequence I would say it might have a bit of value to show at least a little of it, not only because it flows better in that moment, also because the location comes back at the end.
But make no mistake: Outstanding edit and just like TNR my Goto version of this content from now on.
Tip for bystanders: Rebels Recut has the Ryloth Arc as a bonus episode which can be slotted in after this cut without too much headache, giving a very full-universe picture for a complete Star Wars Binge.
I agree with your points on the training sequence. However, time was the main issue with this edit. I just didn’t feel I could accommodate another 5mins, I needed to get them out to Onderon as quickly as possible to move the plot along.