I don't honestly believe this will fundamentally change how anyone plays D&D. Whether you you like these new options or not, I don't think they will have a significant impact on how the game is actually played. A Gnome with a 20 Strength might be stupid, or cool if that's what you like, but it's not like bringing a Goliath with a 20 Strength is going to have a different experience with the adventure.
I agree with this. Here is a semi-related example.
Friend created gnome barbarian, and joined our group. Had a greatsword of course.
Wasn't until 2nd level that we realized the gnome should have disadvantage with a large weapon.
Thought about it a minute, remembered he had been raised by Neanderthals, shrugged and said "carry on".
Unique situation, but re: quote, it didnt fundamentally over power his character because of race or ability.
Not a "big" fan of customizing races, as I feel some species in a fantasy world would share similar traits, but we won't let it stop our game and might use some bits of the idea.