The Bible teaches us that there is one unpardonable sin (blaspheming the Holy Spirit). Mark 3:29

Using this passage as a example, do you think there is any sin that Squaresoft/Square Enix has committed (or could commit) that is/would be unpardonable?

some of examples of what could be an unpardonable sin
-reducing the party from 4 to 3
-making an actual sequel (FFX-2)
-removing random battles
-replacing Ramuh with other summons (does not include FFIX)

I would say the programming error for "Blade Grasp" in FFT is unpardonable. This error made the ability TOO good. For those who don't know "Blade Grasp" is supposed to block physical attacks made by weapons excluding guns, crossbows, and bows however due to a programming mistake the abilility also blocks bullets and arrows.

Remember this is based on YOUR personal opinion.