Not sure what you mean by integrated:
In the States they call in flight following here we call it a hand over.
In short the proposals for a London area (read south east) RIS makes a great deal of sense. So far as the pilot is concerned one seamless service that provides the pilot with a RIS around the conjested south east. We are "promised" it is coming.
The UK will never achieve what the US has. The ATS structure will only become more intolerant of errant pilots and thus more inflexible.
I dont agree. In fact I havent detected any change in the level of tolerance (thank goodness, and well done to all those ATCOs). In fact on a slightly different subject I find in the years I have been flying zone transits are given more readily than ever (with one notable exception!). Moreover, I think the authorities would like us to move closer to the service and systems the US has. Some of that is for cynical reasons perhaps (less CAS busts, better ability to monitor what we are doing) but who cares if it makes for a safer and more integrated enviroment for all airspace users we should embrace these changes.