[TeMPOraL]

> some rocket configurations are inherently impossibly to calculate total dv for (eg, a lunar-orbit rendezvous mission a la Apollo).

I think this fact should be communicated clearly. After all, the game has a bunch of "sorta but not quite" indicators already - like the burn time in maneuver nodes, or the orbit display that doesn't take into account atmosphere when deorbiting/projecting deorbiting with a maneuver node, etc.