This is a simple mod that increases (in most cases) the amount of fatigue that weapon attacks cost. The fatigue cost of a weapon attack is now much more dependent on weapon weight and swing duration. Designed for use with Movement Fatigue Halved (https://www.nexusmods.com/morrowind/mods/44779) or Speed and Stamina (http://www.nexusmods.com/morrowind/mods/42190).

Movement Fatigue Halved / Speed and Stamina make running cost less fatigue, which is great, but they make fatigue fairly useless, since weapon attacks don't cost that much. My solution is to increase the amount of fatigue that weapon attacks cost, dependent on weapon weight and swing length. Daedric and ebony weapons will now require quite a bit of fatigue to use effectively due to their heavy weight, but still have the advantage of having the best DPS. Glass weapons are even more valuable now as they have an incredible damage/weight ratio. Remember that if you find yourself running out of fatigue all the time, you can always do partial swings to conserve stamina (think of them as non-power attacks as in later TES games)

Details:
Previous formula for fatigue cost (based on experimentation): 2 + 0.25 * weapon weight * swing length
Swing length is between 0 (for an tiny swing) and 1 (for a full swing)
New formula: 2 + weapon weight * swing length

2.0 update: Almost 10 years after the original upload (crazy to think it's been that long), I've uploaded a new version that addresses the exploit users commented on where hand-to-hand costs zero fatigue, by reverting back the base fatigue cost to 2. (In Better Fatigue Usage 1.0, the formula was just 0 + weapon weight * swing length, making attacks cost nothing for a weightless weapon.)  For most weapons, this will have a negligible impact, but for hand-to-hand or other very light or weightless weapons, it will ensure that all attacks cost some fatigue.  The original version is still there for those who prefer the base cost of 0.

Installation: Add the .ESP file to Morrowind/Data Files as usual and activate it.

Recommended mods:
Movement Fatigue Halved (https://www.nexusmods.com/morrowind/mods/44779) - this mod is STRONGLY recommended; if you use my mod without Movement Fatigue Halved or a similar mod, you will probably find yourself running low on fatigue a LOT.
Speed and Stamina (http://www.nexusmods.com/morrowind/mods/42190/?) - was the recommended complement to this mod prior to Movement Fatigue Halved; I now recommend Movement Fatigue Halved over Speed and Stamina.  Use Movement Fatigue Halved or Speed and Stamina, not both.
Kobus Daito and Stamina Mod (http://www.nexusmods.com/morrowind/mods/358/?) - renames usage of Fatigue to Stamina, if you prefer the Skyrim-style terminology.

Compatibility:
Should be compatible with almost any mod other than those that change fWeaponFatigueMult (load this mod after any conflicting mods to ensure that this mods weapon fatigue multiplier takes precedent).

Permissions:
Feel free to reuse, modify, or distribute this mod however you want.

Please post comments if you think my changes are too extreme/not extreme enough for a particular play style; I can upload alternate versions as requested.

My other Morrowind mods:
Better Governing Attributes (http://www.nexusmods.com/morrowind/mods/43017/?)
Lower First Person Sneak Mode (http://www.nexusmods.com/morrowind/mods/43108/?)
Speechcraft Rebalance (http://www.nexusmods.com/morrowind/mods/43113/?)