The hardware skill is from an older build of the game. It was an experimental part of the game where it was used to build hardware components such as CPUs and other chips. Unfortunately, that part of the game wasn’t completed and did not make it into version 0.1.x. I guess I forgot to remove it.
You don’t necessarily need these skills when selecting features in the feature area. However, if your team lacks sufficient skills to develop a feature, there will be a development time penalty. So, it’s advisable to have team members with relevant skills by hiring employees who possess them. But keep in mind that it’s not mandatory.
Regarding your other suggestions, they are mostly under development, and it will take some time before they are implemented in the game. I appreciate your patience, and in the meantime, why not follow us to receive updates when newer versions are released?