I love so so much about these. I genuinely felt more emotional impact from part 2 than I did in any of the 3 actually films.
As mentioned, the way Owen is used is fantastic. I loved the relationships between the core 3. Anakin's arc was so much more tragic and human. I think if these were fleshed out, they would make an excellent trilogy.
There is some straining in part 3 to preserve later secrets. It works just about, and I like the idea of keeping things hidden, but some further work there is needed to sell it.