In my game we do this:
1) All monsters have 2 good saves, perhaps 3 if high CR
2) All monsters have some sort of bonus action and reaction available to help against player action economy
3) Some monsters have more standardized resistances, ie all undead have the same resistances, usually more than listed, as some were left out
4) Intelligent monsters, some have things like potions or minor items (for players to find, possibly. no "chests" in my games to loot, almost ever)
Also, although I am not qualified to figure it out, CR system really needs some serious work