The left panel of the fitting window seems to be able to hold one more tab in Hardware, named Implants & Boosters, and an icon above drone and cargo bay, where it would open aditional wndow for pilot with implants and boosters like for drones, where u could add and remove implants and boosters.
That tab in hardware would hold all the implants that give effects to ship, and in simulation mode u could unplug and simulate different implants and drugs without destroying them.
Images how it could look:
With Pilot window open:
Fits would be saved with pilot, like the drone bay contents are saved.
Pilot icon would be inactive when not simulating.
Because now u cant simulate different effects that u can have in head and see at the same time in stats for ship on the right. Which is awful.
I know its a lot of programming and testing, and there is pyfa, but pyfa will not always be updated so you may consider that as alternative.