One difficulty concerning immersion is the cloning handwave. Some people have lingering injuries which are great for RP. However, it doesn't hold up when technology can magically fix scars and surgeries are flawless. I feel there should be more lore based limitations that ensure you can't just clone away your imperfections.
Perhaps certain substances or DCD create cloning errors. Maybe regulations on the clone treaties limit the amount of manipulation in a clone so at some point certain imperfections just need to be accepted or after a certain period of time passes. Anything to give a solid reason to why a character can have lasting and hindering physical damage that can't be magically fixed by super surgery or cloning out.
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Sly's Reply
I am once again asking for combat injuries developmental support.
No, but really, that's the only way you're going to get that. I personally added scars whenever I was knocked out by combat but not killed (and it made sense, depending on weapon type) and once or twice roleplayed lingering injuries (broken nose, that kind of thing) but really, there should be mechanics to hinder and guide players away from just going to a medic and being tip-top shape in a few minutes.