Currently, the numerical/percentage EXP gain is not shown when killing monsters.
This seems to be poor design for two reasons:
1. Confirm EXP gained.
In crowded maps, there is currently no way to confirm if I’m getting EXP from killing monsters. I don’t know if I’m getting KS’d. More importantly, however, I can’t confirm that my grinding is actually doing something. This leads to my next point…
2. Skinner box.
Showing EXP upon killing a monster is an easy way to add a lot of juice to your system. It feels rewarding to the player and gives confirmation of a successful engagement. Stacked lines showing EXP gain from large mob kills is highly satisfying as well (think MapleStory). Getting confirmation makes players want to continue hunting monsters (myself included), and honestly sometimes I get paranoid that all this killing isn’t doing anything.
My proposed solution is to show EXP gained as a white line of text on the right side of the screen, which fades after a few seconds. This is implemented in MapleStory and should work in this game as well.

