If I remember right, the limitations they specifically mentioned (not ones they hinted at), were inventory limitations, glamours not being able to be set per gearset, not being able to have lists for inventory, multiple color dyes per item, zones not being "wide and open", no open world dungeons. I THINK there were a few others but I don't remember them enough to quote them.

As for inventory space being limited I find it weird they blamed PS3 then threw more retainers in as added costs. So supposedly we won't have any MORE retainers due to that I guess?