This may have been discussed before, so apologies if it has.
Something I always found strange in HOI2 was the ability of subs and other naval units to identify land units in neighboring land provinces. (A very handy 'trick' to see where to land your troops uncontested).
I noticed that in Johan's video where he attacks Sweden as Norway, the sub he sent to stockholm revealed a unit.
Will this be a feature of HOI3 ?
.......to a lesser extent I also felt it strange that a strategic bombing mission also revealed units not only at the target but also enroute to the target. I seem to remember that an air unit flying over a naval region would also reveal units in neighboring land provinces.