Decrease default flare altitude. The previous value was way too high for any small aircraft. It was also unsafe because after the flar, pitch is currently controlled open-loop, which means that stall can potentially happen during the flare

src/modules/fw_pos_control_l1/fw_pos_control_l1_params.c

@@ -278,7 +278,7 @@ PARAM_DEFINE_FLOAT(FW_LND_HVIRT, 10.0f);
  * @increment 0.5
  * @group FW L1 Control
  */
-PARAM_DEFINE_FLOAT(FW_LND_FLALT, 8.0f);
+PARAM_DEFINE_FLOAT(FW_LND_FLALT, 3.0f);
 
 /**
  * Landing throttle limit altitude (relative landing altitude)