The reason some people are upset is obvious: They quite reasonably expect Obi-Wan Kenobi to be the main character and primary focus of a series named Obi-Wan Kenobi.
You mean you're not looking forward to seeing Reva's story unfold in a series which is titularly about a completely different character who has been around for half a century? You bigot!
You mean you're not looking forward to seeing Reva's story unfold in a series which is titularly about a completely different character who has been around for half a century? You bigot!