Because of a relatively low gravity on my character controller, the character walking/running animation stutters when moving down slopes. (Every few milliseconds it recognizes him as being in mid-air, so it keeps switching between animations). I can increase the grounded gravity to fix this but then when the player walks off a ledge they fall like a dead weight compared to when they fall from a jump. Any ideas how I could try overcoming this issue?

function ApplyGravity () {
    if (controller.isGrounded) {
       // Keep reset when on ground
       movement.verticalSpeed = -movement.gravity;
       movement.airTime = 0.0;
       movement.leaping = false;
       activeInput.move = true;
    }
    else {
       // Start counting time in air
       movement.airTime += Time.deltaTime;

       // When we reach the apex of the jump, set reachedApex to true
       jump.reachedApex = jump.jumping && !jump.reachedApex && movement.verticalSpeed <= 0.0;

       // When jumping up we don't apply gravity for some time when the user is holding the jump button for a higher jump
       var extraPowerJump = jump.jumping && movement.verticalSpeed > 0.0 && jump.jumpButton && transform.position.y
         < jump.lastStartHeight + jump.extraHeight && !IsTouchingCeiling ();

       // Apply gravity to vertical speed
       if (!extraPowerJump)
         movement.verticalSpeed -= movement.gravity * Time.deltaTime;

       // Make sure we don't fall any faster than the terminal velocity
       movement.fallSpeed = -movement.terminalVelocity;

       // Check for wallsliding (and if so, decrease fallSpeed)
       WallSliding ();

       // Check vertical speed against terminal velocity
       movement.verticalSpeed = Mathf.Max(movement.verticalSpeed, movement.fallSpeed);
    }
}