Ability to change only part of a cabin configuration and be charged accordingly
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Detailed Description
At the moment if you want to upgrade one class of your aircrafts IFE, you need to replace and pay for the entire aircraft to be configured. If this is a long haul aircraft with four classes it can be millions of dollars.
I suggest, a bit like the real world, if you are not changing the number of seat slots and therefore not affecting the other cabins, you can amend / upgrade the IFE of your chosen cabin and pay for only that cabin to be improved as opposed the whole aircraft.
Example: I have a four class B777-300ER. I've decided that the IFE offering for first class needs to be improved but the IFE for the other classes can remain unchanged as they achieve 100% rep. I want to take the existing basic 6 seat slots and keep it as before, but increase the screen size / quality and choice of TV/movies to include live satellite. Therefore, if it was real life, I'd simply upgrade the existing seats or remove the existing seats and replace with the chosen alternative that takes up no extra room. I only need to pay for the cost of these seats.
J class, Y+ and Y remain untouched and therefore there's no cost involved.
Context
If you have a large fleet and only want to change 1 class of the aircraft, rather than perhaps costing $10m per long haul aircraft, the cost would likely be $1-2m per aircraft. The cost difference is huge.
It closer mirrors the real world and allows users to tweak their IFE without having to pay to reconfigure the whole cabin unnecessarily.