I think something that would be very helpful as we see more and more complex tanks would be the ability to hide components from other categories.
Ie: If I was working on the fuel system of a Tiger II I could hide everything that isn't a part of that.
It's a more minor thing but I do think it would make it a lot easier to understand what parts I need to place or am missing in order to finish that section, Especially when coupled with the part list in the tank status menu