Thank you. It's a bit difficult at this early stage of the new mission style to tell if I'm doing it wrong or if the game is accidentally balanced in such a way that succeeding in mid stage ~Rep 80 missions is just off the table. The new structure is much more opaque from this side.
With the removal of tools, the streamlining of almost everything into always-on boosts, Intel/mercenary/network access no longer presented, and the ability to tab out of the mission screen mid-op removed, it seemed clear that I was not supposed to be 'doing anything' once I've pulled the trigger on a mission, and I was losing with lvl 7/8 stats on lvl 5 missions.