The media learned on May 4 that the MLB issued a stern warning to the Los Angeles Dodgers because Adrian Gonzalez gave Shohei Otani a bag of baseball items (autographed uniform, Dodger merchandise) during an exhibition game with the Mexico national team last fall. The MLB also issued a general warning to teams about coming into contact with Otani while the Nippon Ham Fighters were in Arizona for spring camp in February.
The media also learned on May 4 that the MLB is planning to submit a request to open discussions about making changes to the current posting system. The system was last revised in 2013 to include an upper limit posting fee of twenty million US dollars and the ability for any MLB team to sit at the negotiating table if they are willing to pay the posting fee. The deadline to request a change is May 5 (Japan time).
Source: Sanspo 5/4/2017
[UPDATE 5/5 @ 6:02pm]
A report at Sponichi points to the possibility of the MLB wanting to lower the posting fee limit.
Source: Sponichi 5/5/2017
[UPDATE 5/8 @ 10:23pm]
The NPB informed members during an executive committee meeting in Tokyo earlier today that they received a request to discuss possible changes to the posting system from the MLB. The NPB has not yet received any specifics about what the MLB wants to change.