I am not sure what changes have been made.
As you say, until the actual regulations and the list of proscribed businesses are published we don’t know much more.
Since the “people to people” travel will have to be in groups, I would think that there would be an expectation taht groups will have more records than individuals. But a lot will depend on whether Marco Rubio’s interpretation (that anything owned by the Ministry of Tourism would be banned) is correct.
Or perhaps the US embassy will set up spy cameras on the entrance to Sloppy Joe’s to see if any Americans go there.
Comparing this with the previous version, the biggest change seems to be a new FAQ:
"8. How do the changes announced by the President on June 16, 2017 affect authorized
travelers to Cuba whose travel arrangements may include direct transactions with
entities related to the Cuban military, intelligence, or security services that may be
implicated by the new Cuba policy?
The announced changes do not take effect until OFAC issues new regulations.
Consistent with the Administration’s interest to avoid negatively impacting Americans
for arranging lawful travel to Cuba, any travel-related arrangements that include direct
transactions with entities related to the Cuban military, intelligence, or security services
that may be implicated by the new Cuba policy will be permitted provided that those
travel arrangements were initiated prior to the State Department listing of the entity or
subentity. Once the State Department adds an entity or subentity to the list, new direct
financial transactions with the entity or subentity will not be permitted, unless authorized
by OFAC. "
Plus several references to that.