Lucky's had the actually obnoxious part of it removed. The original text is below.
You have 3 luck points. Whenever you make an attack roll, an ability check, or a saving throw, you can spend one luck point to roll an additional d20. You can choose to spend one of your luck points after you roll the die, but before the outcome is determined. You choose which of the d20s is used for the attack roll, ability check, or saving throw.This got seriously OP when you were making a check with disadvantage or facing an attack with advantage. If you made a check/attack with disadvantage and then used Lucky you could pick any of the three dice, turning Disadvantage into Super-Advantage. Worse than that if you rolled a 20 and something else with Disadvantage you could see that 20, trigger lucky, and turn it into a crit no matter what you rolled on the extra dice.
New Lucky can't be used unless you're simply rolling 1d20 and can't be used for auto-crits. It's a non-trivial nerf and 5-8 Lucky isn't functionally the same.
In 2015 Crawford identified that reading as a potential problem. In my view, they've fixed it, not nerfed a contorted reading.