I'm thankful that Alabama elected Jones. That said, the exit polls point out several interesting things and I'm looking forward to looking at them more later. A few quick notes from a cursory review:
1) Had the write-ins been Moore votes, we would have seen a Moore victory, which suggests that this came down to Republicans / Right-leaning Independents not stomaching voting for Moore
2) In case you haven't seen it, take a look at the racial breakdown, it's amazing. 96% of blacks polled voted for Jones, 68% of whites polled voted for Moore, and 2% of whites polled voted write-in.
3) Younger voters continue to be more progressive than their elders. Voters under the age of 44 made up a minority of the vote (35%) but voted for Jones (60%) while a majority of voters over 45 voted for Moore, though not at the rate of 60%.
The exit polling information I've briefly looked through can be found here: https://www.washingtonpost.com/graphics/2017/politics/alabama-exit-polls/?utm_term=.c687cadd54ed