Disagree pretty strongly with this, you can have any opinion about Hauritz as a test bowler, but as a OD bowler he is pretty damn good.
Doherty is a pretty one-dimensional spinner, bowls flat, at the same pace, and doesn't spin the ball much either, and on slowish pitches, he could easily get destroyed.
Haurry on the other hand, can attack or contain depending on the situation, and he is very good, against left handed batsmen.
To put is simply, Hauritz as a OD player is an important cog, in the Australian team.