I like where you are going with this…slows down the game for us veterans but new players will have nothing to compare it to…plus, i kinda have an idea where you may be going with combat
One suggestion I have (or may want to think about especially when combat is initiated) is the addition of arrow keys or the usage of them on a PC for one-step/one-square navigation…If you were ever familiar with the old space-combat game TDZK (R.I.P.), you can implement a lot of similar hunt/kill ideas such as transponder fixes to see what is in the system/where (especially if the object/target is continually moving - TDZK did this by using a transponder “timer” within a certain range to let you know how close it was to you within a given timeframe), Skill-Up for various scanners (combat or otherwise), and some other Rexx original ideas like “in-flight” torpedo and missile systems
Also, can you color code the mini-map to differentiate planets, stations, asteroids, and other objects? Bonus if you can further highlight a target freight delivery mission or asteroid mission on the mini-map (it is kind of a pain-in-da-butt to hunt all over the large map for the intended mission destination )