If technology is free for all, everyone flies the same ship and uses the same guns. That is how it is on the servers that allow free choice. Almost everyone uses nomads guns there.
If technology is special request, there will be favoritism and unfairness. If that happens in a game, the game is no longer fun for people who dont receive favors, and for those who believe in fair play.
In the new system you can be as individual as you like in your role play, you just wont get a pvp advantage from it.
The change with nerfed mixed technology in version 4.86 is good.
But how will the player who uses mixed technology know that his guns are less efficient?
Will the infobox have a dynamic entry that changes, which shows the real efficiency and not the optimal one?
Or will the player only notice it through the effects that his shots have?