So, first off i love that you can switch between two sets of weapons, it adds alot of versatility
But, it is hardly fitting in every scenario, sometimes you might want to just have one weaponset while still being able to toggle between two sets of abilities.. Let me give you an example :
Imagine you're a fulltime tank, so you sport your heavy armor gear and you only want your sword&board weaponsetup, but you still want access to your 2x5 abilities (say, if you want one bar for singletarget tanking and your secondary bar for AoE-tanking).
Now, would you have to grind in order to get two sets of sword/shield in order to switch weapons so you can get your secondary ability-slot, or is it possible to just switch slot but remain with your only set of weapon/shield?