I think you guys are making something out of nothing.
As per the "no outside food beverages", I'll bet most properties have that so called policy, but it is never enforced. Sure they would like you to buy your booze on property, but just watch any of the 20, 30 year olds, even older as they unload their stuff at almost any property. There is almost always cases of beer, soda, ect. And they use the bell hop carts to take it to the rooms.
That just isn't enforced.
As per the "based on previous play" stipulation, I am sure I have seen that small print on various comp offers. But again, it isn't enforced. If your play drops considerably below what they were "expecting" they just stop the comp room offers. Been that way forever. I mean I don't know that they could legally do that. The player would have a printed out confirmation stating charges $00.
Again, I don't think these kind of "policies" are new, you are just noticing them because this is a new property stating their policies. I'll be surprised if either is enforced.