The whole basis for the maneuver node system is incredible annoying. Why do I need to somehow pan my camera over to the part of the main trajectory in order to place a node rather than just doing it when im focused on the target? Why does the maneuver node even need to be on my screen when im adjusting it- I dont care whats happening at the node, I care whats happening to the trajectory im trying to influence, give me a menu in the bottom left to tweak. Also why physically stop me from planning the entire maneuver just because the game thinks I dont have enough fuel?- Even when the game is actually correct about how much deltaV I have (which it often isnt), it can be helpful when designing stuff to see how much more deltaV I would need.
Maneuvers were clunky and annoying in KSP1, and rather than improving them they made them worse.