There are two workarounds that I know of:
There’s a new key command, ‘Edit Info Line.’ With an automation point selected invoke that command, then hit tab. Now, the value field is selected and you can use shift-up and -down to make adjustments in whole numbers.
It can be done with the Project Logical Editor.
To lower the value
Create a preset thus:
Filter: media type=automation, and is selected
Action: Trim: multiply by .9999 (or some value you can live with)
To raise the value
Create a preset thus:
Filter: media type=automation, and is selected
Action: Trim: multiply by 1.0001
With these presets assigned to keystrokes you can nudge automation points up and down. Kind of a decent workaround…