The 1.30 Firmware has been taken down from the support site. It may do a little too much at once.
Removing 802.11b is not a bad thing for most people.
Conditions that make a firmware unable to be downgraded are not always avoidable.
Distributing a firmware that removed 802.11b and also will not allow the end-user to downgrade said firmware, could result in customer service or RMA issues neither the customer, seller, or manufacture desire.
Granted from what I have seen, people are reading the release notes and the warnings about the firmware, but I am looking to be on the safe side as the user base with access to the code made change (not read).
It may go back up because the benefits to the majority are to great, but for now we just need too take a closer look at the release.