Is there a way to get all account_operations (withouth the pagination stuff)?
No.
We can pull them for you if you request it.
Is there any information about "Real-time updates using Socket.io" ?
It is being used in production, but the API isn't considered stable enough yet to be properly documented.
There have been promises of improvements and big announcements but nothing much moves. Not even answers to our concerns/questions here.
I'm starting to feel a little disappointed in bitcoin-central.
Could you be a little more specific ?