Merc's are enough strong atm, specially compering to official server. They will be tottaly unbalanced compering to main Chars if they get more buffed..
Inventory isnt annoying if u know what u should carry, even with the original amount of slots chars can be way too strong for all bosses/places. Ofc the bigger the better but its makes you think of what u should have on you and not carring everything!
Its Wirt's leg, its way to classic for all old D2 players, its like a tradition, way too classic to be forgotten