Well there's one graph

But the top of the web page and the worker stats are more up to date than most if not all other pools.
The user hash rate and pool hash rate updates once per minute, but you can't really update a hash rate every second since that doesn't really make sense - it's an average rate over a period of time.
The rest of those numbers are accurate to the last share you (or anyone on the pool) submitted as long as the sync at the bottom of the page is 0.

However, if you mine with an address instead of a user account, then yep there's not much information.

Yes.

That's the point of an API, it provides data to manipulate, not a web page.
The web site shows the data formatted.