Especially in a state like LA, racial numbers matter
much more than partisan numbers. You have tons of Dixiecrats who have died over the past four years (as well as those who've simply updated their affiliations). JBE won by 12 in 2015: the shifts here in EV by race (if indicative of the final result, which is unlikely) would still point to an 8-point win.
Also, perfectly poignant to note that the EV as of now (43% D) more or less matches the current share of RVs who are D (42%). In 2015 it was 51% and 46% respectively, but again, LA's voter rolls today look much more like the actual voting habits of people in-state than they did even just 4 years ago (when the registration stats were unrealistically Democratic-friendly - which to be fair, they still are in most contests).
More people are voting early as well, which obviously means any Democratic overperformance in EV is going to be minimized (but honestly better overall, as it doesn't set unrealistic expectations when Democrats overperform massively in EV and then get slaughtered in ED vote).