Likely this is already in JIRA/github/whatever, but to be sure:Give us further specific examples of old mission mechanics you liked (ideally in a separate thread) and we'll add them to our ever-growing brainstorming session.
In X3 the mission difficulty and rewards were depending on your fight (and trade) rank. I really liked this, because it kept doing missions interesting much longer. Can we have something similar in X4?
Besides giving more to do when you already have a shipyard & multiple capitals, it also would add to the immersion. It feels awkward asking the CEO of E-Corp with multiple fleets of capital ships to repair a satellite or kill an S ship for a few creds or a single inv item. While the first one is difficult to scale up, the latter would be (using fight rank, standing, total net value, etc).