I very like sticker book system, and it is interesting to collect items for it, but it sad that game does not reward players for filling it (except transmute crystals cost reduction which is not essential).
My idea is to add some new type of writs that use sticker book system, for exampe, writ that require to reconstruct some random item from collection, such writs can have some unique rewards, for exampe a chance for companion golden items drop or something else special that will motivate players to fill sticker books and do such writs, also writs for perfected items can have more valuable rewards. Also it will be good way to spend transmute crystals.
This will motivate players to collect items for filling sticker book, so players will have more reasons to return to base game zones, do world bosses etc
Players will have more goals in the game. What do you think about this idea ?