Right of course the AT-ST should be able to turn its head, its not like the AT-ST, would have the turning arc of an owl. Try turning your own head past your shoulder and tell me how far you get.
Notice the lowest side of the chin where the gun is located, even IF the head could turn it would bump into one of the legs or scrape heavily against it.
With turning i mean a 360 circle like Markus pointed out. Thats what the person also meant who asked that question, looking totally backwards while the rest is standing the other way. He compared the ATST with vanilla 2142 battlewalkers, just so you know.
Yes, the head can look around, but only in limited ways.
lol im sorry what have i done ! ive created a monster !!! so many complaints about the at-st now lol sorry devs ... no it looks good and alot of you guys were right i looked further into what two diff types there were .... just use to seeing the short and stubby ...... Walker ! .. short and stubby walker ... yea ! ... wow