Rationale for SRU: the package is completely broken in its current state for all locales with translated aplay output. Users with such modems won't be able to use them at all. With the simple fix (tested locally), the driver can be installed with Jockey very easily.
Of course, 56k modems are not that essential today, but the risk of SRUing only affects users with such modems, so it's definitely worth it.
Rationale for SRU: the package is completely broken in its current state for all locales with translated aplay output. Users with such modems won't be able to use them at all. With the simple fix (tested locally), the driver can be installed with Jockey very easily.
Of course, 56k modems are not that essential today, but the risk of SRUing only affects users with such modems, so it's definitely worth it.