Can token values be evaluated in a complex datapoint?

yep, to get that in you use:

// get a host level property
property = hostProps.get("<propname>")
// get an instance level property
property = instanceProps.get("<propname>")
// get a task level property (in case you don't know where the prop might be)
property = taskProps.get("<propname>")

the value of the property would be stored in the property variable. More here.