Combat wheelchairs

[MaxWilson]

Much of what you discussed can more easily and efficiently be handled narratively. Just describe them as being in a wheelchair, but mechanically everything works the same. There is no mechanical difference between being 5' tall or 7' tall.

Well, there is actually. From the jumping rules:

High Jump. When you make a high jump, you leap into the air a number of feet equal to 3 + your Strength modifier if you move at least 10 feet on foot immediately before the jump. When you make a standing high jump, you can jump only half that distance. Either way, each foot you clear on the jump costs a foot of movement. In some circumstances, your GM might allow you to make a Strength (Athletics) check to jump higher than you normally can.

You can extend your arms half your height above yourself during the jump. Thus, you can reach above you a distance equal to the height of the jump plus 1 ½ times your height.

Being 7' tall gives you an extra 3' of vertical reach.

Being in a wheelchair should logically prevent you from jumping.