+1 for all except :
The PHB does not say aynthing about jumping in combat. But logically that should also be a full action.
"Jump" is supposed to consume "movement". Not an action or bonus action. Even in combat.
PHB page 190:
In combat, characters and monsters are in constant motion, often using movement and position to gain the upper hand.
On your turn, you can move a distance up to your speed. You can use as much or as little of your speed as you like on your turn, following the rules here.
Your movement can include jumping, climbing, and swimming. These different modes of movement can be combined with walking, or they can constitute your entire move. However you're moving, you deduct the distance of each part of your move from your speed until it is used up or until you are done moving.
Thus,
it's my understanding that the distance of the "jump" would be limited by the character's movement speed.
Admittedly, I haven't done enough research to know whether or not the distance is properly calculated in BG3, but "jump" is definitely not supposed to cost a bonus action.
I'm not sure I understand every points you tried to make about jumping (my apologies if my answer didn't fully fit that then), but I think I agree with you that there are some balance issues when it comes to things like "jump" and "shove".
I really like this "quick reference" guide to what is considered "action", "bonus action" and "movement speed" (among other things) according to the PHB :
https://crobi.github.io/dnd5e-quickref/preview/quickref.htmledit : same with "Hide", it should be an action unless of a class feature like for 2nd level Rogue or 14th level Ranger.
