Originally Posted by
freemind001
The US Airways DM transfer query was simply because I might not be flying with them in the future due to changes in company travel policy

You don't have to fly on US to credit miles to DM. If you compare how many M&M / DM miles are needed for awards especially in premium cabins, you'll want to hang onto your DM miles until you have enough for a nice award flight.
And why

because you won't be flying US Airways?