I have to admit, I think we manged the clock very 'effectively' in the last stages of the game. I can sympathise with Chiefs fans on this matter, as I too would have been enraged by it if it were happening to us. However, I think all teams do this and it should fall at the feet of the ref to sort. I think Healey pointed out at one stage that we used up 90 secs just to reset a scrum... well then the refs need to get coy to it and speed up the process (without jeopardising safety) or give free kicks against teams for not resetting in a certain time frame.
But as others have said (as well as Healey), I think Exeter got away with a few things in the game so can't feel too aggrieved.