I'd add a couple more things.

Stats aren't as important, at least not compared to later addition where you had to take certain stats to certain scores or you fell behind the maths curve. It is only at high stat scores that it makes much of a difference in 2e. The difference between a fight with 9 STR and 16 STR? 1 point of damage. That is it.

It also means cookie cutter builds are less likely. And it encourages different builds. Want a high int fighter? Go for it. They work perfectly fine.

And secondly - skills, or non-weapon proficiencies. Unlike later editions where skills ended up being an all or nothing affair, 2e's NWPs meant anyone could contribute. And a bigger bonus is that warriors weren't useless outside of combat. They actually get as many NWPs as anyone else.