343's ploy of making Halsey a war criminal
343i didn't make her the war criminal, bungie did. under their reign did someone come up with her abducting children to create super soldiers.
it doesn't matter whether or not those children went on to save mankind (foremost because it wasn't threatened yet) and it doesn't matter whether or not Halsey was "told" to do so by FR genetic programming (as long as the UNSC doesn't know) etc. - all emotions aside the facts are simple:
Halsey had a leading role in the abduction of children for military training and action. that alone is a despicable act, but Halsey topped it off with highly experimental medical procedures, that killed and crippled many of the subjects.
she isn't the only one to blame but the other actors simply aren't important for the new trilogy's story (and i'd rather have them explore details like that later on, rather than "waste" time now, as the core of the reclaimer saga is still evolving.
also, i'm sure that Halsey had the best intentions, but the road to hell is paved with those.
by definition, she is a war criminal but that does not make her an evil person and neither does it mean that one isn't allowed to like and/or admire her anymore, because she is more than just that, especially from an "almost-all-knowing" Reader/Player's POV.
i like this twist and how it shows that halo is not so black and white anymore.
TL,DR: war criminal =/= evil person