Heath is not as bad as some are depicting him to be. He makes mistakes but he also makes plays. He has speed and tackles pretty good. All players have shortcomings and that is just part of playing the game. Those that are so sure about what his evaluation should be are imposing their opinion ahead of the professional staff on the Cowboys and feeling justified in doing so.
My opinion about him is favorable but that isn’t what’s important. He has earned a spot on the lineup and the organization seems to think he is ok there. That alone makes him a valuable member of the team. You can continue to differ about what his evaluation should be and that the Cowboys staff is completely in error about him but he is there and to differ with that position is a subjective determination not based on what his current circumstances seem to indicate.
If and when the organization pulls the plug on him then we can all say he is not what he needs to be but at the moment he is a starter and that is the deemed to be by most standards a determination of a players value.