If the Pathfinder games, which are some of the most complicated RPGs on the market in terms of understanding the mechanics and intricacies of the builds, can sell millions of copies then I think people can understand 5e racial attribute scores. I sincerely doubt this change is going to sell any copies whatsoever, it may be a positive change for many people, but it's not something that is going to suddenly get them to change their mind in regards to buying the game. If they really wanted this to be a 100% positive change, they'd offer options to use the old rules, or at least change it so that humans/half elves/shield dwarfs aren't nerfed in their attribute scores.
I think far fewer people care about the racial ASIs no longer being fixed than the amount of people who are glad that every race is now at least somewhat compatible with every class. And yes some races lost out a bit there with now having fewer points and no much in terms of other bonuses but I think Larian are still balancing that aspect so it should be fine...I'm sure the races lacking will get a little extra when all is said and done.
