It’s a nice idea in theory however can be abused (in terms of being used to grief/bitch at other players), if this were to be added a 4 hit maximum limit (the equivalent of people who can fit in a four door car) should be done to insure it limits the amount of problems it could potentially cause, it also needs to be trialed and errored, too many problems and rip etc.
I don't think it can get abused. The timer starts after the first hit that is being placed. That means any hits placed on the same person after the initial hit don't reset the timer. Only the amount is being increased.