I think that you understand, however, what I am proposing is no different than a model landing in a lake, but having open ground within 3", per the rules. According to the rules, if they land on terrain, or in water, they may be moved to the nearest open ground within 3", placed Prone, and have no AC's remaining. To me, this means that they are somewhat self-guiding, but are gonna land hard if they miss their intended LZ (hence Prone with 0 AC). If they land more than 3" off board, then they would be, truly, lost.
Does this make my point clearer, or have I muddied it further?