Weapons shouldn't all be equal, limitations in weapon proficiencies or restrictions can be a major factor as can little tricks different weapons can do.

The spiked gauntlet is perfectly fine the way it is. A fighter can wear spiked gauntlets while wielding a greatsword if they get grappled or swallowed they already have a weapon in hand The spiked gauntlet.

Also no weapon should have a critical mod like 19-20/x3, 18-20/x3, 18-20/x4.