Two suggestions from me:
-Duel Wielding. Now, not everyone, at any point, can DW. It requires a lot of practice, strength, and skill to duel wield weapons. This is what I propose, taken from a post I made in another thread:
1: Characters start out with basic weapon skills, and after reaching 50 in a particular weapon skill, you can equip a similar item of that weapon category in the off hand slot, but only small versions. Say if you reach your sword skill to 50, you can equip items such as daggers, tantos, wakizashis, etc, in the OH weapon slot.
2: In order to duel wield larger weapons, such as longswords, blundgeons, hammers, etc, that would generally be used with a shield+main hand, it would require a much higher skill, say 75, to actually be able to equip the larger version of the weapon in the OH. Damage done for the offhand weapon is based on weapon skill, moreso than your MH weapon. Once you reach 100, you will do 100% damage with that weapon, but there is a greater penalty under 100 skill for your offhand weapon than your MH weapon.
3: You can't duel wield two handed weapons, ever. This isn't World of Warcraft, and you aren't a fury warrior.
-Being able to pick which hand is your "main hand", or "writing hand". I want to be able to equip a shield with my right hand and a weapon in my left. Why can't I?
1) Agree to an extent, but it doesn't take any skill to pick up two objects at once, instead I would suggest allowing the player to dual-wield at the outset, just like they can use a shield or a two-hander, but until you level up you are handicapped by the off-handed weapon, ie: it isn't much better than having a one-handed weapon, or it could even make you less accurate/precise.
2) Again, no reason you couldn't pick these up and hold them in your other hand, just a question of whether you'll be at all effective. The heavier the weapon in your off-hand is the more powerful you have to be to make good use of it.
3) Yeah, never ever.
Rather than restricting the player let the player feel the consequences of his/her actions when not properly prepared. Plenty of players will immediately equip two longswords and wonder why they keep stumbling and getting beaten down by goblins.