Riff raff, while I can't truly argue the fact that 2 bolts are better then 1 and that it does add some form of redundancy, the fact of the matter is, we are on phase 3 of the MGB because of mounting foot issues. Which in at least one (phase 2) incident resulted in complete separation of one foot. At which time, the second fastener adds no redundancy.
Now, you kinda condradict yourself a little as well. You made the following statement about structural failure, "structural failure of the housing is considered to be an extremely improbable event." Yet it seems you strongly believe that the suspension bars are at fault or at least believe that they should require some form of redundancy. Even if this was determined to be suspension bar failure, which is yet to be determined and was not determined to be a fault in the previous accidents, wouldn't that as well fall into being an extremely improbable event?