Kinda surprised by the negative reactions to this chapter, to me this seems like the best chapter of the last few months so far. Glad I reread Water 7, makes me feel more appreciative of Saul's return.
It's because they don't like the idea of Saul being alive and believe he should stay dead.
Imo it's a good thing Saul lived because this proves there's at least ONE important person in Robin's life who is still alive. This is supposed to be a very emotional chapter for Robin because she lived for 20 decades in constant fear, being alone, before she found the strawhats. But with the reveal that Saul is alive, Robin got a glimmer of hope that there still exists parts of her past which are important to her.
I didn't read the rest of the spoilers because I'll wait for the full chapter. This is one of the few chapters when you need to see and read the panels, not knowing what's described in the spoilers.