So far, it didn’t matters so much. There are so much mobs and spawning so fast that it is almost impossible take care of ks (looking at mines) while you play, not to mention most of the time you are hitting multiple mobs at once.
I got quest progress, exp and items when someone other finished to kill my mob, and even when I were the one killing someone’s else dying mob.
When it comes to special field mobs, it seems everything is shared so there isn’t any ks.
Exp, item, quest progress mechanics are to be know in more details, sure, but so far I guess ks isn’t something to be afraid of. Maybe we can talk of it again on higher levels, if the case.

