One of the tweaks in Wrye Flash allows you to alter the number of words for the hacking minigame. You could use this tweak to make the minigame ridiculously easy and pointless if it bothers you too much to do it. On the other hand, it becomes extremely easy with a decently high Science skill, anyway.
It does not become that easy even with a perfect Science skill.
This is because in the hacking minigame, the dud words remover is random EVERY time.
Even at Science 100, I have encountered Easy grade terminals, with 10 possibles, a mere 2 dud words brackets, and no replenish.
Remember that you can get both XP possible with terminals that unlock doors by hacking the terminal, exiting out, then lockpicking the door.
When I find doors or safes like that, where the doors do not require a 'key' (in those cases the 'key' is the terminal), I pick the lock on the door first, then hack the terminal second. Doing things your way will only ever give you one part of the XP possible since the terminal has unlocked the door fully for you.
Jenifur Charne