Westwood got a good stint in that friendly v England, more than the 45 minutes and yet a <100% Shay was used in the game v Scotland.
I suppose it's hard to tell what O'Neill is thinking regards the goalkeeping situation but his rationale was suspect in the past in relation to Westwood.
If Westwood does not play v Austria, I can't see Mon deciding that he will become nr 1 at any time.