Content will be much less of a problem quite soon. During summer they're going to release dungeons (which include new quests), companies (which include new quests as well) and jobs (which include new quests, three), new NMs, and new sidequests. Depending on how they are implemented, that has the potential to be quite a big chunk of content added. The fact that there isn't much time from now to the end of summer doesn't mean much, simply because as yoshida clearly explained multiple times, things have been worked on in paralel for quite a while.