My only critique is the notion that Fighters at 1st level get half plate. Um....half plate is 750 GP, I don't expect that kind of money until like 3rd level.
So yeah monks are very MAD, but they can have a reasonable AC compared to 1st level fighters.
I agree, 1st level fighters can match or exceed Monk AC. 16 AC is the monk max. That is a dual-wielding or Great Weapon Fighter, unless they take Defensive, then it is 17.
A shield fighter has between 18 and 19 AC at level 1.
In fact, 16 AC is true of any class who can get medium armor, but can't use a shield. So at 1st level the following classes can match the monk's maximum AC which cannot improve until level 4.
Artificer (Can use shield to get to 18)
Barbarian (Can use shield to get to 18)
Cleric (Can use shield to get to 18)
Druid (Can use shield to get to 18)
Fighter (Can use shield to get to 18)
Paladin (Can use shield to get to 18)
Ranger (Can use shield to get to 18)
Warlock
Meaning the Monk is better than a level 1
Bard
Rogue
Sorcerer
Wizard
... Assuming the bard, warlock, or wizard do no combine mage armor with shield.
And at 3rd level it wouldn't be hard for certain subclasses like the Valor Bard, Draconic Sorcerer, or Bladesinger wizard to match or exceed the monk, who can't increase their AC until 4th level.
But Monks absolutely have better AC than Rogues... barring the exceptions like the Swashbucklers new ability and magical armor...
Why do we think Monk AC is reasonable again?