The ability to prevent certain orders/channels from allocating stock from a certain location would be benificial.
for example, we must maintain a certain stock level for our Amazon sales forcast, so the ability to prevent other channels accessing this stock while still allowing orders from our Amazon channel to access the stock would be benificial as currently we are having to off-hand or quarantine all the stock for amazon causing amazon orders to allocate to alternate stock and therfore leaving an untrue stock figure
Not ideal solution, but with Order Rules you can route orders based on conditions to another warehouse. So could add a virtual warehouse called 'Amazon', then for Channel 'Amazon' orders route to this warehouse. Just an idea