IMO, the OP has extremely valid points.
The whole series prior to the two minute warning following Houston's FG was miserable. You need two first downs to win the game regardless of Houston's time out totals. Worst case scenario is you punt and Houston ties (which happened). Perfect time for misdirection or a screen to get solid yardage vs a run defense on 1st down. We slammed it up the gut. Then the inexcusable delay. The screen to Harris should have been the 1st down call, would have put the D on its heels prior to second down and short.
As Houston was tying the game, I felt a TO should have been called when the Texans were inside the ten to conserve time for a possession prior to end of regulation- I really felt Houston would play for the win and a 2 pt conversion which would have made the impetus for more time on the clock to be saved.
Harris also should have been coached to kneel on it in that scenario. I liked everything about the execution of the possession prior to Bailey's miss. The possession in OT was Bryant saving the team with a miraculous catch. And I do not like settling for 50yd field goals which is what happened again. This has cost the team in the past several times. It's a bit fearful playcalling.
My greatest takeaway from this game was: We did not play well at all, and still beat a decent team. and the fact that thee defense had to repel momentum that had built for the Texans to do so was big as a point of growth for the defense.
Also, someone needs to tell Tony It's ok to settle for FG's leading by ten late in ball games. Two costly redzone turnovers in this ballgame for my liking, and we still got the job done somehow.