Personally while all of ATV+ shows have been good they seem to be missing that stand out one at the moment. It needs it's House of Cards, handmaid's tale, transparent which fully legitimises it.
At some point as well they are going to need to go broader with their content which is what Netflix ended up learning. High quality content is less accessible which limits the services appeal. That's ok now as Apple has the money to subsidise the expensive niche appeal content but at some point they are going to want the service to make money, after all that's why they didn't restrict it to just Apple devices . You need that mix to appeal to the largest cross section as possible