Looks like President Trump is just cleaning up some old business. This EO actually is late. § 5542(b) of the Military Justice Act of 2016 requires the President to “prescribe regulations implementing [the MJA] not later than one year after the date of the enactment of this Act.”
http:// www.caaflog.com/category/military-justice-legislation/military-justice-act-of-2016/
Looks like President Trump just wanted to take more time to review suggested changes that were already proposed before he was elected.
Other background can be found on the following site…
http:// www.caaflog.com/category/mcm/