Today you have a lot more inventory management then a stance dance warrior back then, thanks to all the different trinkets, legendarys, talents and covenants zu can switch on the fly.
All you have to do was putting a /equip 2handed makro in Battle/Berserkstance and a /equip 1hand+shield + Spellreflect makro + /equip 1hand + shield makro for dstance, cause the abillitys u wanna use with 1hand/shield were just useable in dstance, except spellreflect.