This would be a welcome change. I'm sitting on a ton of coins I can't use. Was also thinking it would be cool to introduce a monthly PvP skill oriented character, make shards available for that character in the store, and make the price costly. after X amount of shards you can combine them into the character. After the month is up (or even a few months) pull the character and add it to souls as a 5*, add a new character, rinse and repeat.