They could unrestrict alot of the repeatable gil quests they killed when they were all RMT Death Trigger happy. The rollanberry quest being one of my favorites they gimped.
Another method would be increasing the buyback rate across the board for items to npcs outside of those abyssea npc food items. Downside is that the economy is going to inflate like crazy with new gil being added into the system.
As kaht said though, the economy isn't that horrible for low lvs. Crystals sell really decently due to there never being any on the ah. FoV is a nice suppliment as well.