If you have equipment and item weight being a factor, it's important for the party to have somewhere safe to store their less crucial items.
I know Skyrim uses equipment weight, but it seems just to slow the party's movement.
Personally, I consider it more trouble than it's worth. The things equipment weight would impact can be simulated nicely without adding another statistic. Really, here are the penalties I see equipment weight would bring:
- Player can't dash --- realistic but just annoying for the player without affecting combat in the slightest
- Reduced attack speed (I've assigned this to heavier armors)
- Reduced Evasion (can't very well dodge if you're lumbering around in heavy armor or wielding a heavy battle axe)
- Reduced attack accuracy (HIT percentage drops)
- Reduced Defense. For example: One character I have wields dual knives, but this means she has reduced defense when doing so because she has to stay closer to the enemy to attack effectively with the small blades.
- Barring the player from using a type of equipment (shields usually)
- Greater sensitivity to certain elemental attacks
All of these can be done nicely with the current parameters for Weapons, Equipment, etc. Then it's just a matter of adding some descriptive text mentioning the, say, battle axe is awkward and must be used two-handed.
So I agree it's good to balance out armor, weapons and the likes by making them grant the player bonuses or penalties during combat. But with all of the parameters you can modify, there's no need to add Equipment Weight. Here are some I've used:
- Bows and arrows are powerful, but much slower (Attack Speed -100), tend to miss (HIT percentage -10%) and you can't use a shield with them (Seal Equip: Shield). I assume the characters who use these are NOT ultra-proficient in their use, but know the basics.
- Heavy armor slows the player (-10 AGI, -5 EVA, -10 ATK) but reduces magical damage (Sp-Parameter: MDR 90%).
- Magic Robes - user can ONLY equip an Accessory (Seal Equip: Head, Shield)
- Dual Knives lower defense (-10 DEF) but hit twice in a round (Atk Times +1). To balance these they do less damage each attack.
None of these require equipment weight, per se.