Thanks to all who pointed out Game Update 19 which directly addresses Model Damage. I apologize for causing confusion. I guess that I got too caught up in the idea of delayed effects of damage, and forgot to review the updates, even though Update 19 has been out for over a week already....
As stated in Game Update 19, teams will NOT get a call of Model Damage for damage to the Obstacles mission models.
As also stated in Update 19, the fragility of these models is a variable that teams should expect and design for. A strategy that relies upon a mission model breaking in a particular way is not a very robust strategy. Teams should not expect that the Obstacle models at tournaments will break exactly the same as they do during practices.
Steve Scherr
VA/DC FLL Referee Advisor