Hindsight isn't in play IMO. The Rams chose based on pre 2016 play. Tru had a very good 2015 and JJ was still making a dumb play or 3 or 4 per game, despite having more skill, that cost TDs. He admitted to having lapses during the game due to losing interest or something like that.
So, it was the mental side that caused Snead and Fisher to go with Tru. Plus I bet they counted on him signing a more affordable deal.
Based on 2015 I preferred Tru. I hated JJ's mistakes every game. Who knew a different coach could fix the problem.
In hindsight JJ looks like the clear choice.