We do not know how stats will be distributed.
Acording to the players handbook the highest value you can have at lv1 is 15, before applying racial bonusses.
Most games based on a D20 system used point buy with increasing costs for higher stats, like P:K, NWN1+2 and also KotoR1+2.
I guess we will get something similar.
In BG1+2 most people just re rolled until they liked the result.
If anything, it could have the effect that players chose a custom char over an origin char, assumimg the origins have fixed stats.
In the video he selected an origin char and did not change his settings, but this was pre alpha.
This way the game would feel more like the original BG1+2 with your main char and different companions.
Between having max stat at 17 or rolling, I'd roll. 15 max is too crippling.
The point buy in 5e is not very popular, so the option to roll is becoming a necessity.
