I'm not sure if this is the right place for this, or if people are interested in having the developer comments translated from the French forums (I know it's popular from the Japanese interviews/comments, etc.), but here it is anyway (roughly translated):
"
Concerning the equipment cost of accessories, it is possible it will be removed in the future.
The developers think they can simply remove the accessory cost system. However, there is the possibility for players to equip a large number of accessories which will diminish the overall impact of each accessory in particular. Also, this will cause inventory problems.
"
Translation is a little rough but that's the main point, anyway. Sorry if this has been mentioned before but it's the first I heard of it and I'm happy they are considering it!