I'm not trying to be some O'Brien apologists by any means, I often disagree with his decisions and I do put our problems on him, not entirely but the buck stop at the HC. I do think some of use here such as yourself can become overly critical of him, sometimes he makes the right calls and players just fail to execute simple tasks. I also think some posters on here get way to defensive and protective over O'Brien when he does mess up, i.e. Mr.Tex. Pretty sure I have argued with you both numerous times lol.
Honestly in game I probably agree more with your 2nd part, I want to be aggressive and go for the win. But I can't argue with results either, and he is what 30-2 now when leading at the half, the 2nd loss coming against Philly. Idk this discussion is where I feel bad for HCs lol, you can play it smart like OB did and if it doesn't work out you get called out for not being aggressive, if you go for it and miss leaving them a short field you get called out for making a dumb decision(see Vance Joseph). There is no right decision until that clock hits 0, by then your either a hero or a clown.