The system is in a state of change:
The members of the Class of 2020 will receive their branches in November, but the process of assigning them will be different than ever before.
www.army.mil
I don't quite understand it, nor did I when my DS commissioned four years ago out of AROTC. It appears that there is an attempt to better match up the Cadet's academic background and career desires with the branching outcomes...all while putting the same premium on academic performance in the OML. One thing that will not change, as
@kinnem said, is placement in AD vs Reserves will change year to year with a continued premium on the OML number.
Whatever you do,
do not base your choice of a College Major on the perception that it will improve your chances of receiving a scholarship or that it will improve your chances of AD or getting your branch of choice. GPA will continue to be the most important variable in the OML calculus. IOW you don't want to rack up a bunch of C's or worse, before changing your major from Computer Engineering to Criminal Justice.
Cyber, which is still in the process of being built out and which is in need of a narrow array of academic or professional skillsets, is maybe the one branch where your major, given a good GPA would trump the OML, which still puts a premium on one's GPA. However, Cyber is the sexy branch right now and should be built out by the time you commission.
Best of luck!