I think it's unneeded and I guess no one have such an ego that he/she just want to have a storage for Coupons or always carries his/her Coupons. Ragnarok in all isn't realistic. So why change it how it was made? No one will think it gets more realistic just because of the weight of an Item. If you want to make it realistic it needs to be 3D completly and not just the Maps. And RO2 Is in D so this won't work either, it'll be like change a game with the same name.