Would some system by which engine geometries (length, diameter) could be modified with a display giving internal air pressures with an easily accessible reference to pressures of various planetary bodies be given such that players have to option to firstly, model actual rockets to a higher degree of accuracy, and second optimize engines for various environments, IE taking the same base engine but having a wider bell on the upper stage for vacuum optimization versus shorter bells on liftoff. Also perhaps a system for aerospike components which can, in much the same way as fuel tanks, be stretched or flattened allowing for the same part to provide options for both linear and toroidal engines.
Some function allowing as to push engine chamber pressures, within thermal capabilities or gimbaling geometry (such as number and type of gimbaling arms, two for instance providing a single axis whereas 3+ provide more, and various kinds, electric, pneumatic, etc with different accelerations and strengths, or even radial engines gimbaled in one axis by a motor) through the part modification tool would also allow for more customization relating to modeling actual rockets. even some system of setting combustion chamber materials with some being more pressure resistant but heavier whereas others are lighter but unable to sustain higher pressures.
Ultimately just looking for some ability to modify engine aesthetics while simultaneously having them translate into more realistic performances considering particular geometries.
A feature like this feels like it would fit into the style of construction simple rockets appears to have and I feel additions like this would be useful for expanding on the educational benefits of kerbal space program by giving players some potential insights on some design aspects that go into designing rockets rather then focusing entirely on distribution of mass and orbital dynamics. I'm curious what other people interested in rockets think of such an idea, does it have a place in this kind of game? does it overcomplicate the process too much? should some default vac and sl optimized engines be provided to players? Thank you for reading, have a wonderful day!