XI was similar. Your critical hit rate was derived of a 5% base with a player DEX vs enemy AGI formula to determine whether it went any higher. The stronger the enemy, the lower your crit rate.

It wasn't until Abyssea and Seekers of Adoulin that gear with ridiculous amounts of powerful damage boosting stats were introduced in order to compensate for insanely strong enemies compared to a base level 99 character..