One thing that has always bothered me about Fallschirmjäger, a unit that has the word parachute in very name, doesn't actually parachute into the battlefield. It's an aesthetic touch that may seem superfluous but in all seriousness I recommend the creation of a PE reward unit that would be essentially identical to the Fallschirmjäger, except that its call in would allow it to be parachuted anywhere on the map.
Reasoning: being able to paradrop Fallschirmjäger would be beneficial for the player since it would allow the player to call in the unit anywhere on the map, without the need of surrounding structures. Their purpose is to be able to infiltrate behind enemy lines- they should not be dependent on the existence of nearby structures for this end. Furthermore, by using parachutes Fallschirmjäger could reinforce on the field just as American and Soviet airborne infantry do, further extending their utility as an elite combat unit meant to fight behind enemy lines or at least far from reinforcement points.
Is this overpowered? Not necessarily. Regular Fallschirmjäger have a better element of surprise due to being called in quietly from neutral structures, whereas paradropped Fallschirmjäger would not have the same element of surprise due to being brought in by relatively noisy aircraft. Therefore even regular Fallschirmjäger would reserve their purpose and would continue to exist, thus not harming the base game itself.