Glade Riven
Adventurer
I like the common/uncommon/rare division. If you can fit everything about a class into a two-page spread, it's not that bad as far as size. Heck, if they can reduce a 20 level class to a single page, it's even better. Modules would allow for more variety, both in the PHB and splats.
Speculation on the list:
Assassin [1e subclass, kinda 3e (prestige class)] - rare
Barbarian [3e] - Uncommon
Bard [1e, 2e, 3e] - Uncommon or rare
Cleric [0e, 1e, 2e, 3e, 4e, Basic] - Common, out of tradition
Druid [1e subclass, 2e, 3e, Basic] - Uncommon
Dwarf [Basic] - Race, not a class. Paragon modules may exist
Elf [Basic] - Race, not a class. Paragon modules may exist
Fighter [1e, 2e, 3e, 4e, Basic] - Common
Fighting-Man [0e] - Rolled into Fighter
Halfling [Basic] - Race, not a class. Paragon modules may exist
Illusionist [1e subclass, 2e subclass, 3e subclass] - Rolled into a wizard build, or split between wizard and sorcerer builds.
Mage [2e subclass] - Rolled into another spellcasting class
Magic-User [0e, 1e, Basic] - Covered by other spellcasting classes
Monk [1e, 3e] - Uncommon or Rare
Mystic [Basic] - Dunno. Not familiar with this edition.
Paladin [1e subclass, 2e, 3e, 4e] - Common or Uncommon
Priest [2e class group] - Uncommon? Priests may either rolled into the cleric, or as something kinda like the Avenger or Pathfinder Inquisitor.
Ranger [1e, 2e, 3e, 4e] - Common or Uncommon
Rogue [2e class group, 3e, 4e] - Common
Sorcerer [3e] - Rare
Specialist wizard other than Illusionist [2e subclass, 3e subclass] - Rolled into Wizard builds
Thief [1e, 2e, Basic] - Rolled into Rogue
Warlock [4e] - Rare
Warlord [4e] - Uncommon or Rare
Warrior [2e class group, kinda 3e as an NPC class...] - Rolled into Fighter
Wizard [2e class group, 3e, 4e] - Common
Speculation on the list:
Assassin [1e subclass, kinda 3e (prestige class)] - rare
Barbarian [3e] - Uncommon
Bard [1e, 2e, 3e] - Uncommon or rare
Cleric [0e, 1e, 2e, 3e, 4e, Basic] - Common, out of tradition
Druid [1e subclass, 2e, 3e, Basic] - Uncommon
Dwarf [Basic] - Race, not a class. Paragon modules may exist
Elf [Basic] - Race, not a class. Paragon modules may exist
Fighter [1e, 2e, 3e, 4e, Basic] - Common
Fighting-Man [0e] - Rolled into Fighter
Halfling [Basic] - Race, not a class. Paragon modules may exist
Illusionist [1e subclass, 2e subclass, 3e subclass] - Rolled into a wizard build, or split between wizard and sorcerer builds.
Mage [2e subclass] - Rolled into another spellcasting class
Magic-User [0e, 1e, Basic] - Covered by other spellcasting classes
Monk [1e, 3e] - Uncommon or Rare
Mystic [Basic] - Dunno. Not familiar with this edition.
Paladin [1e subclass, 2e, 3e, 4e] - Common or Uncommon
Priest [2e class group] - Uncommon? Priests may either rolled into the cleric, or as something kinda like the Avenger or Pathfinder Inquisitor.
Ranger [1e, 2e, 3e, 4e] - Common or Uncommon
Rogue [2e class group, 3e, 4e] - Common
Sorcerer [3e] - Rare
Specialist wizard other than Illusionist [2e subclass, 3e subclass] - Rolled into Wizard builds
Thief [1e, 2e, Basic] - Rolled into Rogue
Warlock [4e] - Rare
Warlord [4e] - Uncommon or Rare
Warrior [2e class group, kinda 3e as an NPC class...] - Rolled into Fighter
Wizard [2e class group, 3e, 4e] - Common