⟨11Kerbinator⟩  but only in xyO system, this can be a […] ⮪ Showing AN/DN relative to planetary orbital plane in HCI frame can be much more useful.
as this is a root for a super-high efficiency orbit planning method (plus mod ?????)
Some says that plotting trajectories in Principia is easier, which I can say is that they just don't explore the essence of stock orbit system planning
in fact with appropriate tools, MJ node editor + mod [?????](for my super secret SSTO in stock KSP) it's about 600% efficiency relative to principia.
(I can finish KMMKMEKKJ (M=Mun) in stock style orbits within an hour thanks to months of practising)
so it's not that "hacks" are not useful: it's just that KSP is a game, a interactable simulator, not a dedicated planner (that's what STK should do)