Would player created content work in FFXIV?

[Cabalabob]

In FFXI they had the moblin maze mongers where you built your own dungeon then the moblins had an underground cavern where they built your design, it wasn't very good because it's a 13 year old game and the system was very limited, but my friend and I thought it would be good if they brought that over but better, they could use a system similar to housing to place walls and decorations, give us a large space, maybe 3-4 "floors", give us some themed decorations from existing dungeons like temple, mansion, swamp, cave, fortress, Allagan etc. Give us a list of enemies to place and set their behaviour like aggressive, links etc. Then once you're done you could let people play your dungeon.

[Lambdafish]

they could use a system similar to housing

I know you mean well, and I understand your point... but no-one should ever use a system similar to XIV housing, ever, it's just full of problems. On that note, it does bring up a good point: How quickly would this feature make the servers explode?