Honestly, I’m kind of glad that the show is going to be a new canon, Rebels/Fallen Order-tied in, large-scale adventure, probably full of ludicrous retcons and continuity stretching.

Doing anything with Obi-Wan in this time period that’s actually worth making six episodes of TV about is immediately going to violate the previous implication that he basically just sat in his hut for twenty years (and people who aren’t okay with that will have already resolved to exclude the show from their headcanon). And if you can’t avoid crossing that threshold, why hold back and just tiptoe over it? While I’m sure you could write a neat smaller-scale story like the ones in the comics or Legends, it’d hardly be an event worth bringing Ewan back for after 17 years.

At least a maximalist load of implausible fanservice featuring every possible character in this time period will definitely be stimulating and interesting, even if it’s terrible (if Ahsoka appears I will cackle).