Here they are:
Optional Rules and Variants
You missed:
• Variant Entertainer: Gladiator (PHB 131)
• Level advancement without XP (DMG 261)
o Session-Based Advancement (DMG 261)
o Story-Based Advancement (DMG 261)
Agreed impressive list.
Though many of these I would not consider a dial or lever like emdw45 says. For example the planar traits and many of the monster manual options and variants.
• Customizing Ability Scores (PHB 13)
Point buy - yeah I guess this is a variant but if it were missing people would figure out a way anyway.
• Variant Human Traits (PHB 31)
For when feats are available. I think many who use feats would consider this the default.
• Variant Criminal: Spy (PHB 130)
• Variant Entertainer: Gladiator (PHB 131)
• Variant Guild Artisan: Guild Merchant (PHB 133)
• Variant Noble: Knight (PHB 136)
o Variant Feature: Retainers (PHB 136)
• Variant Sailor: Pirate (PHB 139)
o Variant Feature: Bad Reputation (PHB 139)
Not really in the vein of dials and levers as the customizing backgrounds paragraph seems more like a lever puller than just listing an alternate feature, for instance, I would consider gladiator a separate background not a variant.
• Equipment Sizes (PHB 144)
Pay to make armor fit you perfectly. Ok.
• Multiclassing (PHB 163)
Good lever
• Feats (PHB 165)
Good lever
• Encumbrance (PHB 176)
Default, imo. With the option being abstract. At least that is how it is been done in the past. Now that is flipped. Good lever I guess.
• Playing on a Grid (PHB 192)
Good lever, though more rules for those who want them would be nice and have them on a dial, where you can set the level of detail. DMG has more options.
• Renown (DMG 22)
Good lever
• Planar Traits
o Feywild Magic (DMG 50)
o Shadowfell Despair (DMG 52)
o Blessed Beneficence (DMG 59)
o Pervasive Goodwill (DMG 59)
o Overwhelming Joy (DMG 60)
o Hunter’s Paradise (DMG 60)
o Beast Transformation (DMG 60)
o Power of the Mind (DMG 61)
o Mad Winds (DMG 62)
o Abyssal Corruption (DMG 62)
o Vile Transformation (DMG 63)
o Cruel Hindrance (DMG 63)
o Pervasive Evil (DMG 64)
o Bloodlust (DMG 66)
o Law of Averages (DMG 66)
o Planar Vitality (DMG 67)
Seems like this would be default for the area almost... Uncertain what the gain is by making these options.
• Loyalty (DMG 93)
Good lever
• Training to Gain Levels (DMG 131)
Good lever
• More Difficult Identification (DMG 136)
Good lever, was the default for previous editions. Would have liked more options (a dial) in this area.
• Mixing Potions (DMG 140)
• Scroll Mishaps (DMG 140)
Good levers
• Wands That Don’t Recharge (DMG 141)
Good lever
The following are all good dials and levers. There are a lot more variants in this section of the DMG too. Though still I would have liked to have seen it not be a la carte. A unified play mode, tactical grid mode... etc. Making a list for DMs like this to pick and choose clear options goes a long way to creating a good a la carte menu though.
• Automatic Success (DMG 239)
• Only Players Award Inspiration (DMG 241)
• Flanking (DMG 251)
• Diagonals (DMG 252)
• Facing (DMG 252)
• Level advancement without XP (DMG 261)
o Session-Based Advancement (DMG 261)
o Story-Based Advancement (DMG 261)
• Proficiency Dice (DMG 263)
• Ability Check Proficiency (DMG 263)
• Background Proficiency (DMG 264)
• Personality Trait Proficiency (DMG 264)
• Hero Points (DMG 264)
• Honor Score (DMG 264)
• Sanity Score (DMG 265)
• Fear and Horror (DMG 266)
• Healer’s Kit Dependency (DMG 266)
• Healing Surges (DMG 266)
• Slow Natural Healing (DMG 266)
• Epic Heroism Rests (DMG 267)
• Gritty Realism Rests (DMG 267)
• Explosives (DMG 267)
• Firearms (DMG 267)
• Alien Technology (DMG 268)
• Plot Points (DMG 269)
• Initiative Score (DMG 270)
• Side Initiative (DMG 270)
• Speed Factor (DMG 270)
• Action Options (DMG 271)
• Hitting Cover (DMG 272)
• Cleave Through Creatures (DMG 272)
• Injuries (DMG 272)
• Massive Damage (DMG 273)
• Morale (DMG 273)
• Spell Points (DMG 288)