To be clear, I'm not concerned about your drone, it's yours and entirely up to you what risks to it's integrity you want to take. Some people freak out that I "risk" my drones flying over the ocean. None of their business.
My concern here is...
If you were flying a real plane, you would be crazy be planning to land with only a cupful of fuel left in the tanks.
You would want to always have a comfortable reserve to be able to deal with unexpected issues.
Flying your drone just as you...
IMO, the forced landing feature is a necessary safety feature and only "annoying" to operators who fail to plan their flight safely. ANY and ALL conditions that will cause this safety feature to activate CAN and WILL be avoided by a properly...
It's not saving the battery, it's saving the battery and aircraft, cause when the battery is empty for real it shuts off and the aircraft drops like a rock.
There is no reason you should ever still be in the air to even reach the forced landing...