With the ease of access that the Duty finder offers I think it would be great to have even more 8 man dungeons.
I still like the FF Themed 4 man parties but I don't think it works as well with the MMO style design. (Tank Healer DD). Maybe if 4 man content was reduced to anything goes it would feel more like a band of Returner misfits travelling from Narshe to Vector.