All motors are swappable, once the airframe is destroyed you swap it into another plane!
The Minis are pretty finely balanced, they are more easily upset by added weight. You are doubling the stator height and adding a lot more nose weight with a C pack. It would work if you scaled it up to swappable airframe size, but not as a mini.
I just buy cheaper motors for my minis, Hobbyking do an 1806/2400kv for $5 which powers all mine, including my SE5 and DR1, with a 6x4 prop.
In practice swappable power pods are a non starter, each plane needs its power pod in a slightly different position to fly well and the power pods break often, it’s part of their function to die and save the motor.