The issue is actually present in all Modes in Autopilot not just Waypoint, and several Modes in other software packages as others have pointed out.
At any rate, your conclusion seems a bit extreme. Obviously you are entitled to you own opinion, but as we stated previously, we have never actually experienced the RTH issue in real world testing (thousands of flights) unless we intentionally made it happen (by turning off the RC). Even in the face of this data, it is completely understandable why you don't want to risk it, but it seems like just using the other options in the meantime is your best bet*. Not entirely sure why Autopilot has to be forever written-off.
DJI may be slow to produce an update, but they will produce an update if they say so. This has always been our experience with them in the past and we have no reason to believe this time is different. Even still, we do have another inquiry into them as to when the fix is schedule (i.e. which firmware version).
*On using the other options - I assume the reason you are so adamant about this issue and active in this thread is because you would actually prefer to use Autopilot. What is it about Autopilot that appeals to you over the other options? In other words, is it one or more of the unique features that we offer because we don't support LCMC, or is it something else?