These two are not the same thing. Every app is allowed to serve you personalized ads, without asking. ATT is about cross app/site tracking between other companies, which is something Apple has never done.
They only upgraded the entry level Macs, as expected. The previous 2 port 13" MBP was also limited to 16GB RAM.
The 4 port 13" MBP will most likely get upgraded early next year and also support more RAM. Apple did announce the transition will take them two years, not sure why people are surprised that their high end hardware is not updated yet on day one.