First off why was this thread revived, it’s old.
Second if you bothered to read Kevin Granade’s Frequently Made Suggestions thread you would see that he’s already addressed dual wielding.
http://smf.cataclysmdda.com/index.php?topic=10444.msg247535#msg247535
As for shields, it might be part of one of the mods I’m using, but I did find a tactical shield in a SWAT truck, and it provided a very large amount of protection for something I just found super early. It has the ‘Shield’ ability and according to the combat logs it’s absorbing some damage for every single attack thrown at me, even though according to its summary it only covers 45% of one hand. So it only applies the encumbrance to one hand but the ‘Shield’ ability makes it protect any part of my body. On top of that, I’m able to 'a’ctivate the shield, causing it to cover more body parts and give a passive 75% coverage but slowing me down, turning it into an effective bullet stopper. As far as I’m concerned this is a fair and extremely useful implementation for shields until the devs want to implement them more realistically, if that’s even necessary. I believe arm guards with the ‘Block’ ability work the same way, only encumbering the arms but blocking damage from any angle.
Is that everything? Yes? Good. I suggest to stop making dual wielding suggestions. Kevin is already aware of the concept of dual wielding. If it’s implemented there will be penalties for dual wielding weapons. At best you can minimize those penalties with a combination of high skill and learned combat styles, notably Eskrima, Niten Ichi-Ryu, and Medieval Swordsmanship.