A problem with ash dead or dying from ash die back is that it becomes brittle. This means tree surgeons cannot fell them, ie, dismember them, in the normal way because it's dangerous to climb them. The hire of a cherry picker can double the cost of taking one down.
Lots of healthy ashes are now being felled by local authorities where they may become a danger to the public, eg, roadsides and parks.
I wouldn't think brittle ash will be good for anything other than burning.
Morris 1000 estates used ash just as a traditional continuation of farm wagon construction where it was valued for its toughness. However it is not very durable hence the need for ash groves to ensure a constant supply.
Brian