Optional EXP/CP Chain Timers?

With all the presents you have given us lately, I am suggesting a simple "quality of life" addition. During battle, chain bonuses reward players for defeating monsters in quick succession, so I am suggesting a countdown timer on-screen. It would encourage quicker gameplay by perception. Players would fight harder, with the knowledge, to keep their chains going.

It would effect EXP/CP indirectly, as players would fight to see the countdown reset to default after each kill. Players challenge themselves during solo play by maintaining high chains, so it would be helpful to veteran players (acquiring limit/cp), and returning players who wish to gain EXP efficiently. It's a simple addition, and one I believe would be welcomed if implemented without issues.