Nah. When we play 3 ATB, he normally has cover. Moreover, one of the 3 usually make an extra body in the mid specially when off the ball saving him a bit from counters. In a back 4, with the modern FB no different from a WB, he is way too exposed.
Atleast thats how I see it.
Anyways, 3 or 4, he is a passenger to have.