I see nothing wrong here - especially readless.

With reads, there are some villains that I could check-back the River with here because I don't expect them to call 3 streets with AT, A9, Ax hands.

Its pretty close i think , river isn't great but depending on villain if he slow plays alot of his 2 pair combos and never calls river with AT or worse.

I'm checking back here vs most villains. Against some stations or weaker players, Im betting small

I think as a standard we probably shouldn't bet here until proven otherwise. This texture there are no flush draws and the few straight draws that there are all complete, making it very hard for him to call with I guess A2 or A10? We're just not getting called here by worse. I would need to think this guy is a complete monkey before I considered putting a river bet in here. A small bet could be ok but given these stacks it's really easy to get cr'ed.