AD is a disaster. He has shown signs of being a quality footballer but there are now so few positives and so many negatives. He has regressed significantly.
His attitude stinks with his talk about being the 6 and a leader at the club all aligned to getting a massive salary.
To answer your question they can play him if we don't have better options. I don't think AD should be played in the spine period which leaves centre or edge backrower. He should prove himself in that role in reserves with a view to developing the guy into as good a player as he can be.
It's mostly his fault with his ridiculous self-assessment of his ability but the club should look at doing the right thing by the guy and try to get his career back on track.