Do you mean switching between melee and ranged weapons? Or actively going into inventar and changing from a 2H to a 1h+ shield? I think weapon sets (3 for fighters and rangers 2 for the other classes) should allow free swapping, but going into inventar to change stuff mid-fight, shouldnot work, especially armour. Swapping potions or consumables though, that should work freely. As of now the amount of resource management in this game is ridiculous, convoluted and difficult. More restrictions would not help at all. But neither should it be possible or desirable to constantly exploit the weak points of the game mechanics.
