Okay, since I was curious I went ahead and tallied up the new unit counts (we did this a while back to gawk at the absurd oversaturation of Knights and Archers in vanilla FFT). This is also after some tweaks I've made to C4 in general, which is by far the most changed chapter.
Chapter 1 Encounters
Magic City Gariland: Unchanged (4 Squires, 1 Chemist)
Mandalia Plains: Unchanged (4 Squires, 1 Thief, 1 Red Panther)
Sweegy Woods: Unchanged (2 Goblins, 1 Black Goblin, 2 Bombs, 1 Red Panther)
Dorter Trade City: Unchanged (1 Knight, 3 Archers, 2 Wizards)
Sand Rat Cellar: Unchanged (3 Knights, 1 Archer, 2 Monks)
Thieves' Fort: Unchanged (Miluda, 3 Thieves, 2 Priests)
Lenalia Plateau: Unchanged (Miluda, 2 Knights, 2 Wizards, 1 Time Mage)
Windmill Shed: Knight replaced with Oracle (Wiegraf, Boco, 2 Monks, 1 Oracle)
Fort Zeakden: Unchanged (Algus, 4 Knights, 2 Wizards)
Chapter 1 Enemy Unit Count
Squire: 8
Chemist: 1
Knight: 10
Archer: 4
Wizard: 6
Priest: 2
Thief: 4
Monk: 4
Time Mage: 1
Oracle: 1
Chapter 2 Encounters
Dorter Trade City 2: Wizards replaced with Time Mages (2 Archers, 1 Thief, 2 Time Mages)
Araguay Woods: 2 Goblins replaced by Gobbledegucks, 1 Goblin replaced by Black Goblin (2 Black Goblins, 2 Gobbledegucks, 2 Goblins)
Zirekile Falls: Unchanged (Gafgarion, 5 Knights)
Zaland Fort City: Unchanged (2 Knights, 2 Archers, 2 Wizards)
Barius Hill: Knights replaced with Lancers, Archers replaced with Geomancers (2 Lancers, 2 Geomancers, 2 Summoners)
Zigolis Swamp: Unchanged (random)
Goug Machine City: Unchanged (2 Archers, 2 Thieves, 2 Summoners)
Barius Valley: Archers replaced with Priests, Wizards replaced with Oracles (2 Knights, 2 Priests, 2 Oracles)
Golgorand Execution Site: Unchanged (Gafgarion, 3 Knights, 2 Archers, 2 Time Mages)
Gate of Lionel Castle: Knights replaced with Monks (3 Monks, 2 Archers, 1 Summoner)
Inside Lionel Castle: Added 2 Knights (Queklain, 2 Knights)
Chapter 2 Enemy Unit Count
Squire: 0
Chemist: 0
Knight: 14
Archer: 8
Wizard: 2
Priest: 2
Thief: 3
Monk: 3
Time Mage: 4
Oracle: 2
Geomancer: 2
Lancer: 2
Summoner: 5
Chapter 3 Encounters
Goland Coal City: Unchanged (3 Thieves, 2 Chemists, 1 Mediator)
Back Gate of Lesalia: Knights replaced with Geomancers (Zalmo, 3 Geomancers, 2 Monks)
UBS2: Unchanged (3 Lancers, 1 Chemist, 2 Time Mages)
UBS3: Unchanged (Izlude, 2 Knights, 2 Archers, 1 Summoner)
UBS1: Knights replaced with Geomancers, Wizard replaced with Oracle (Wiegraf, 2 Geomancers, 2 Archers, 1 Oracle)
Grog Hill: Unchanged (2 Squires, 2 Chemists, 1 Archer, 1 Thief)
Yardow Fort City: Unchanged (Malak, 3 Ninjas, 2 Summoners)
Yuguo Woods: Unchanged (2 Wizards, 2 Time Mages, 1 Ghoul, 1 Gust, 1 Revnant)
Gate of Riovanes Castle: Unchanged (Malak, 4 Knights, 3 Archers)
Riovanes Castle: Unchanged (Wiegraf, Velius, 3 Archaic Demons)
Riovanes Rooftop: Unchanged (Elmdor, Celia, Lede)
Chapter 3 Enemy Unit Count
Squire: 2
Chemist: 5
Knight: 6
Archer: 8
Wizard: 2
Priest: 0
Thief: 4
Monk: 2
Time Mage: 4
Oracle: 1
Geomancer: 5
Lancer: 3
Summoner: 4
Mediator: 1
Ninja: 3
Chapter 4 Encounters
Doguola Pass: Knight replaced with Samurai, Wizards replaced with Priests, Archer replaced with Monk, added 1 Monk (2 Lancers, 2 Monks, 2 Priests, 1 Samurai)
Bervenia Free City: Added 1 Ninja (Meliadoul, 2 Archers, 2 Summoners, 2 Ninjas)
Finath River: Unchanged (random)
Outside of the Church: Knights replaced with Samurai (Zalmo, 3 Samurai, 2 Oracles)
Bed Desert: Knights replaced with Mediators, Wizard replaced with Time Mage, Archers replaced with Geomancers, added 1 Time Mage (Balk, 2 Mediators, 2 Time Mages, 2 Geomancers)
South Wall of Bethla: Knights replaced with Samurai, Archers replaced with Mediators, added 1 Thief (3 Samurai, 2 Mediators, 2 Thieves, 1 Ninja)
North Wall of Bethla: Summoner replaced with Dancer (2 Lancers, 2 Archers, 1 Monk)
Bethla Sluice: Unchanged (4 Knights, 2 Archers, 2 Wizards)
Germinas Peak: 2 Archers replaced with Chemists, 1 Archer replaced with 1 Bard, added 1 Ninja (2 Thieves, 2 Ninjas, 2 Chemists, 1 Bard)
Poeskas Lake: 1 Archer replaced with 1 Oracle, added 1 Oracle, added 1 Revnant (3 Oracles, 3 Revnants, 1 Archer, 1 Summoner)
Gate of Limberry Castle: Unchanged (Celia, Lede, 4 Apandas)
Inside of Limberry Castle: Unchanged (Elmdor, Celia, Lede)
Underground Cemetery of Limberry Castle: Unchanged (Zalera, 2 Knights, 1 Skeleton, 1 Bone Snatch, 1 Living Bone)
Inside of Igros Castle: Unchanged (Dycedarg, Adramelk, 5 Knights)
Murond Holy Place: Unchanged (2 Geomancers, 2 Mediators, 1 Priest, 1 Summoner)
Hall of St. Murond: Unchanged (Vormav, Rofel, Kletian)
Chapel of St. Murond: Unchanged (Zalbag, 2 Archaic Demons, 1 Ultima Demon)
UBS4: Knights replaced with Lancers, added 1 Archer (3 Lancers, 2 Archers, 2 Monks)
UBS5: Wizards replaced with Oracles, Summoners replaced with Priests, added 1 Time Mage (Rofel, 2 Oracles, 2 Priests, 2 Time Mages)
Murond Death City 1: Unchanged (Kletian, 2 Time Mages, 2 Ninja, 2 Samurai)
Murond Death City 2: Unchanged (Balk, 1 Chemist, 1 Hyudra, 1 Hydra, 1 Tiamat, 1 Dark Behemoth)
Graveyard of Airships 1: Unchanged (Hashmalum)
Graveyard of Airships 2: Unchanged (Altima 1, Altima 2, 4 Ultima Demons)
Chapter 4 Enemy Unit Count
Squire: 0
Chemist: 3
Knight: 11
Archer: 9
Wizard: 2
Priest: 5
Thief: 4
Monk: 5
Time Mage: 6
Oracle: 7
Geomancer: 4
Lancer: 7
Summoner: 4
Mediator: 6
Ninja: 7
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Final LFT Enemy Unit Count
Squire: 10
Chemist: 9
Knight: 41
Archer: 29
Wizard: 12
Priest: 9
Thief: 15
Monk: 14
Time Mage: 15
Oracle: 11
Geomancer: 11
Lancer: 12
Summoner: 13
Mediator: 7
Ninja: 10
Samurai: 9
Bard: 1
Dancer: 1