I hated the decision to go for it at the time and it was disappointing to gain the hindsight that kicking could have made a big difference. Down 7, going for it would have been the best decision - there's merit in thinking you might not get there again, and if you don't convert the only appreciable difference in position is you are now almost surely playing for overtime whereas cutting the deficit to 2 or 0 with five minutes to go gives you a lot of time to win in regulation.
But down 8, the logic just doesn't add up to me. If we're comfortable foregoing the points to go for it because we're scared of how effective Denver's defense had been, why are we so comfortable accepting that we'd be putting the game on the line on a 1 chance play (the necessary 2pc attempt)? Joker's post right above me expresses this idea best, I think. Treating the 8 point deficit as a one score game had lose by 2 written all over it, and unfortunately that's exactly what happened.