Hi, I have read the forum since early days KSP1 and joined to add feedback to # 20 the "can't create maneuver node in another SOI," bug. As noted it doesn't really make sense as an intentional decision. Careful use of the maneuver node system in KSP1 can let a player plan a mission from Kerbin obrit all the way out to a suicide burn on a moon of Jool and be confident they have the delta-V and time right.
I want to add my voice to those calling for the ability to create maneuver nodes in the next SOI. Thanks.