With the exception of various 'barbarian' armies, I cannot see the point of multipart plastics for ancients. With models such as Imperial Romans and Hoplites, I cant see the need to have lots of options. Of course, models with different helmet and armour types and styles are always good, but while plastics may appeal to some to be easier to model, I dont see why companies dont use sprues more akin to the GW Lord of the rings sprues. Eg complete bodies with mabye one or two options for helmets or weapons choice.
Am I alone (and lazy!) with regards to ancient modelling? Personally I'd rather have a more uniform regiment and dont see the need for the various options when modeling, or the bother of assembling the models, and I am just as happy with metal models with a few basic options.