Both ... but mainly the former.
It is not just the LARS units either. Some of the changes that you note have come about following the tragic Scottish F15 crash a couple of years ago. See here:
F15 Court Martial Thread
For example, controllers are legally required to have you acknowledge your responsibility for terrain clearance when receiving a RIS in a height block encompassing terrain.
That said, there is too much information and it has now got to the point where I would guess most crews will acknowledge the information without necessarily understanding it or even taking it in. No slur intended, we are all bound by QRs and MAFL, and ignorance is no defence, but how many of us actually know much more than the basic elements?
STH