@Josh:
We do not have an ETA yet on an update to address the issue but are actively working on it and will post when it has been addressed.
In the meantime you can try the following if you wish to revert:
*Revert the Resource Booking Attendant settings
1. flip the Automated Processing back to AutoUpdate on the rooms (set-calendarprocessing [or set-mailboxcalendarsettings] <mailboxid> -AutomatedProcessing AutoUpdate)
2. flip the rooms back to type User (set-mailbox <mailboxid> -type:Regular)
*Edit the script
3. remove the extended property definitions that you do NOT want to re-enable. (lines 274-276)
4. change the logic on line 347 from -eq $true to -eq $false. Line should read: if ($property.value -eq $false)
5. change the logic on line 355 from $false to $true. Line should read: $freebusyItem.SetExtendedProperty($property.propertydefinition,$true)
6. Save the script with a different file name (you'll still need the original script)
*Run the updated script in change mode (only against the rooms you need to target!), ignore the language of the output as it will be all wrong.
*Re-run the original (unmodified) script in read-only mode to validate the changes took affect and Direct Booking is re-enabled.