1. Random enemies and random position
2. Possibility to meet notorius monsters as optional fight (interesting items could be dropped)
3. New dungeons with diffrent paths (a big rock, a big trunk or a broken bridge could block a path and force the party to take a different path)
4. New dungeons with mechanics that force to split the party for a part of the run (some NPCs could help during this parts)
5. Boss difficulty and final reward (experience points, gil, tomestones, drop rate, etc) based on the number of mobs killed during the run (this could encourage to clear all areas and maybe we will have again new dungeons with open space and optional rooms)
6. Some mechanics or some enemy abilities in order to avoid big pulls and so the speedruns, for example an enemy skill able to give bonus on HP/defense to all linked enemies based on their number
7. Making a dungeon a little bit hard will require more time to be completed, so completion should give a greater reward