What I took from what @Ruin Explorer said about initiative being super RNG heavy is in 5e the difference between a low dexterity and a high dexterity is less impactful on initiative order because you're rolling a d20. It's pretty easy for a Rogue with a 20 dex to roll a 1 and go after a character with a dex of 10 because they rolled a 12.That's one area where we'll probably disagree at a core level: in general where there's a choice I want the game to be more random, not less.
Here that would be reflected by re-rolling initative each round, for example.
Meanwhile in 2e, even if you're rerolling initiative each round, it's unlikely a character swinging a two-handed sword is going to go before a character using a dagger because the initiative roll is on a d10 and the weapon speed modifier difference is so large. There's still a chance, it's just less impacted by RNG and more by the decisions made by the player to select a particular weapon type.