Не совсем понимаю, чем тут фираксисы пытаются похвалиться:
We’ve changed the way leaders work in diplomacy. In previous versions, all of the leaders approached the game in basically the same way.
Посмотрим известный Ref Guide по четвёрке. Например, Екатерина:
fav. civic: Hereditary Rule
fav. religion: Christianity
favors: culture, military
builds wonders: often
trains units: moderate
aggression level: high
espionage level: very high
tech trading: willing, 20%
relation factor: 2
peace probability (%): 0/20/80/100
attack courage: high
will raze city: never
refuses to talk delay: moderate
warmonger respect: 2
base: 1, share war: +1 (max. +2)
favourite civic: +1 (max. +3)
same religion: +1 (max. +5)
different religion: –2
close cultural borders: max. –4
worse/better rank difference: –2/0
technology: none
strategic bonus: cautious
happiness bonus: annoyed
health bonus: furious
maps: pleased
open borders: furious
declare war: pleased, declare war on X: friendly
stop trading: annoyed, stop trading with X: annoyed
adopt civic: annoyed, convert religion: cautious
defensive pact: cautious
permanent alliance: pleased
vassal state: annoyed
Понятно, что тут не всё относится к дипломатии. Однако, параметров, влияющих на дипломатию полно.
Так что слова "все лидеры действуют, в целом, одинаково" кажутся странными.