He is hardly a very low quality bowler, any more than he is a bowler of great potential. I don't know why people seem to think you have to fall into one bracket or other.
He's a decent fast-medium bowler who can do a job in my opinion, but is not top class at international level. Third seamer in limited overs would be a decent assessment.
He can easily be replaced by someone more potent and more skillful from our domestic scene.
Will and should happen soon.
That's why I don't rate him highly.