I approve of revamping the GPI system, it will be needed soon when they implement 2nd 100 Craft.

one thing to mention about the value of crafted items, its difficult to base the GP value based on the price, because servers are different, plus an item may be rare now become widely available later in game, this will force them to adjust its GP value, which is highly unlikely, or else we will end in the same position as now rare item with low GB value or vice versa.

IMO the GP value of an item should be based on the skill rquired to craft the item plus its subcrafts.