I have idea that I could show next to your score stats show for some time something like: Score 46298 +100 Kills 14 +1 when you kill someone or you capture tiles.
Why not, but it not like a poping score at center of the hit.
This poping text animation is a standard graphics for Damage in RPG games.
It give to the player the satisfaction of damage.
Maybe make some more specific idea - put some text to description. Because I declined this... I like somehow specific ideas so I can then mark them as completed for example.