I have always used a rolling system that keeps the RNG range close enough that no character is far more powerful than another unless they have ridiculous luck such as rolling a ton of 18s.
I generally use point buy with inexperienced players or large groups to make it easier to start the game and run it with a large party. High stats make the game hard to run in 5E given the assumptions most monsters/NPCs are built on. You're probably wise to use point buy. Keeps the game simple to run. The way stats are on this game, most characters will end up with a 20 in their major stat at some point. All high rolls isn't particularly useful or necessary in 5E. High stats don't improve AC much, though they do help with saves. You can still find a weak save or two to attack. There's not much material difference between rolling and point buy save the chance at a 16 or better to start.
I generally use point buy with inexperienced players or large groups to make it easier to start the game and run it with a large party. High stats make the game hard to run in 5E given the assumptions most monsters/NPCs are built on. You're probably wise to use point buy. Keeps the game simple to run. The way stats are on this game, most characters will end up with a 20 in their major stat at some point. All high rolls isn't particularly useful or necessary in 5E. High stats don't improve AC much, though they do help with saves. You can still find a weak save or two to attack. There's not much material difference between rolling and point buy save the chance at a 16 or better to start.