It's not a fact that they are doing their job well, it's an opinion, so rather than say "don't seem to get" I would have said 'don't seem to agree' with that opinion.
In my opinion I would agree with you that they have techniques, but if those techniques are producing more lies about the way in which he killed Shanann and are hiding the (IMO) fact that he premeditated the whole thing, then it wasn't effective in this typical case of family annihilation. Chris Watts is no different from the others, even though they told him he was, IMO.
Instead of quoting me in a post to someone else, it would be better to use the reply function to my post, because that is the same as talking about someone while they are still in the room.
Now we are left with a murderer claiming he killed Shanann because she told him he wouldn't see the girls. It sullies her memory IMO. I believe he strangled her coldly, calculatedly and calmly with her pinned down while she was sleeping. I believe he used the same coldness and calculatedness with the girls in the truck, although theirs was a worse ordeal because they had the fear of being awake and knowing what he was doing. Whether Shanann told him after an earlier argument he would not see the girls is not relevant, because if he wanted to keep his girls he wouldn't have planned to also kill them. Had Bella not woken up I have no doubt he would have made the rounds to their bedrooms and also killed them while sleeping.
He took off Shanann's ring, he hid her phone, he put gas in the truck, he used the credit card, he sent the doll picture - why? Because he planned ahead, this wasn't done in a panicked half hour of madness and reaction before he left. He set his alarm to do this. IMO.
He sent calm texts to his colleagues from the site and took photos of sunflowers, why? because he was thinking, he was not in a panic.
As far as I'm concerned he planned this all in NC when he left that letter at his parent's house on August 6th (put up on another site that we are not allowed to link to but allowed to discuss) telling whomever it may concern that he would never do anything to harm his children or his wife. I've compared the handwriting and it matches his writing in my (inexpert but educated) opinion. His family did not take that letter to the police yet it is evidence out there in the world. Why they would not hand it over to investigators and investigators knew nothing about it at the earlier press conference shows me that his family knows it shows premeditation IMO.
I'm all for trying to understand killers but not for promoting their damaging lies. They should have left this to a psychiatric evaluation in due course IMO.