The reason I want stat rolling is because I also want to use feats.
Good point. I also want to pick feats but feel forced to max main stat asap on every PC, because of how important it is. I hope next edition will separate ASI's and feats again.
Another good point is making sub-optimal builds more on-par. Like an Elven Fighter can roll 18 Strength rather than start with 14-15 which heavily railroads all elves into finesse builds.