If you are not familiar, the Gambit system is where you can make simple if-then programs for your party members such as "Ally HP<60% -> Cure". It really took the tedium out of mob fights as you don't have to mash the A/X button a hundred times just to get to the next settlement and in boss fights you could focus on the bigger picture and prepare for dangerous moments. It allowed a more sophisticated approach to battles as enemies and non-party allies also ran on the system and could respond to certain tactics used by the player. In a few boss fights there are also restrictions on actions the party members can do (such as disabling basic physical attacks) which forces the player to change their gambits.
Finally working out the right set of gambits is incredibly satisfying as your party works like a well-oiled machine.
Finally working out the right set of gambits is incredibly satisfying as your party works like a well-oiled machine.