[What is the actual item/mechanic/thing being targeted?]
Keybrand 
[What would you like specifically changed about it?]
Increase its base damage. To… er, 80? Maybe 87?
[Why do you feel that this change is needed?]
I believe that this would serve to make Keybrand into an alternative to Orichalcum/Mythril Swords as a true melee option with slightly less range and damage, but having the upside of a noticeably faster swing speed (20 base usetime on Keybrand vs. 25 base usetime on Orichalcum Sword and 26 base usetime on Mythril Sword).
[Anything else you would like to note]
Keybrand’s current base damage is 70. Both Mythril and Orichalcum Swords have a base damage of 92. All have no minimum and maximum damages set.
For a rough range comparison, I stood and swung at this sign in Items with the same equipment and modifiers on all the swords, timing 5 swings for each.