There are many way to balance experience and it could be more satisfying for everyone than just with a limit on kill xp.
What about those that want to play a bad party that's note helping anyone but that want to rob and kill ?
That's a really good point. Not a playstyle I would ever adopt, as doing quests and interacting with NPC is what I like the most but that would explain it's existance, even if it has some negative influence on other aspects.
I play the original Deus Ex again and I still think that this game has the best exp system ever.
I also love how it doesn't railroad players into doing one thing only (like modern DE do). Everything, from hacking to combat takes up resources - the better you get the less resources you will spent on each obstancle, whenever it's hack, lockpick or combat, but it doesn't prohibit you nor encourage you to always do that one thing. If you are a lockpicker you are likely to consider lockpicking more often, and you will be able to lockpick more things overall, but it doesn't mean you will always do that - sometimes using up ammo might be a more preferable option. Similarly, a combat oriented person can go everyonce in a while for a hack or lockpick - it will just be an expensive things to do.
Deus Ex is shockingly well designed.
