It's my understanding that in FFXI, once you hit an enemy, it becomes in some sense the property of you or your party in that you get the xp and loot when it dies even if someone else in the area decides to smack it around. (Or should be).
I was wondering how difficult it would it be for FFXIV to adjust monster stats on the fly based on the number of members of your party. It could get more HP or do more damage or make more frequent use of special attacks against larger parties. This would have to be more than linear, I think in order to keep the fights interesting, at least for HP. Maybe triple for a party of two, times ten for a party of four. 'Bonus' xp could be 10% per party member, so a 100xp solo monster would be 150xp each to a party of 6 (with no reason 6 needs to be the maximum party size).
Or there could be some mechanic to generate additional foes once a battle starts against a party (Yes I know everyone but me hates random battles). Or some combination of the two. Obviously you wouldn't want multiple copies of a boss running around.
That's just my thought. Does anyone else have some ideas on how FFXIV might work for both?