Disagree. It combines the disadvantages of conventional helicopters with the disadvantages of multicopters, with few of the advantages of either.
Conventional helicopter design extracts rough, unwieldy horsepower from a reciprocating engine and delivers it to one or at most two rotors using mechanisms such as shafts, gears, and belts. The mass penalty of such a system drives the convergence towards designs with short drive trains and large rotor disks, and with relatively complex control systems involving independent adjustment of the pitch of each rotor blade.
The current trend towards multicopters is driven by increasing availability of powerful electric motors and batteries, and the availability of computer-driven controls for them. With an electric multicopter, you can have fixed-pitch rotors on each of four or more motors. You control attitude by independently adjusting the amount of power delivered to each motor. The inefficiency of the smaller rotor disks is compensated by the lighter weight of electrical power distribution and by the elimination of rotor pitch controls. Having all the motors and rotors identical yields economies of scale in production and support. System redundancy is achieved by designing so that flight is possible even with the failure of one or more motors or rotors.
--Bob K.