I predict there will be a bustling market for geological and engineering studies in those neighborhoods. After an engineer signs off on a property it won’t be counted among those at risk, hence no effect on values. Even some that might be at moderate risk can probably do some remediation to prevent or mitigate the damage.
La Costa didn’t take a hit when those 2 streets came down the hill last year, neither did Oceanside’s College Ave corridor after it lost that hillside a while back.
BTW, there are a lot of La Jollans who consider Mt. Soledad to be a different neighborhood than La Jolla.