a HR that only one loss can be taken by a non specialist divisional unit. Further losses have to be either corps sized units or specialist units. The existing rules about which units have to be taken as first losses would still take precedence.
I don't think problem is taking 2 losses with INF div's. In our last game I think it happened once or twice.
I see three benefits for using unlimited break down:
1) There is always MOT div to take first loss in blitz.
2) Lots of invasions, specially for Japs.
3) Easier to transport units over seas.
Without unlimited break down blitz combat would cause more losses in BP's for attacker.
We can remove unlimited break down next in game.
Edit: We can also go with this HR, but those situations will be quite rare. I would say first 2 losses can't be INF div's. If you roll 14 (3 units lost) you can destroy 2 INF div's and some other unit.
If your attack is going really well, it's an ambush.
-Murphy's war law