providing a column for each location in 'my inventory combined stock view' as well as a total available.

this would make FBA decisions much easier, as you could see when there is no FBA stock but there is another location stock. Allowing you to select each SKU for a warehouse transfer, or pack list to send to FBA.

It would perhaps need a new item selection (not combined stock) where other fields are unavailable if values are set differently across locations.