Having ridden a M1200S in sport mode and realising that if I owned one it would spend most of its time trying to fire me into the scenery I'd hate to imagine what a +160bhp Monster would be like. As JP said, more power than you can use, but as Kawasaki's H2 has shown by its popularity you can never have too much power
unless you actually want to go faster in something other than a straight line.
I guess Ducati felt they needed something to replace the Streetfighter 1098 and to compete with the Aprilia Tuono, BMW K1300R, KTM 1290 Super Duke R and MV Agusta Brutale 1090RR. They've obviously realised that the Monster brand was stronger than the Streetfighter brand.