Pheryll
Set Designer
Depending what exactly you mean by refresh, I think they might have to offer a great deal more than that to be tempting.
By refresh I mean restarting the expiration timer at its original value for its bonus effects. I agree it is not that tempting (every 6 or so 10 chest runs you get a free crusher build) and it does mean reserving space for all those 2x2, but it is a start that would not be significantly game changing and definitely not overpowered. From this start, implementation can expand to more tempting uses. If we start with something that might be seen as overpowered, it may be less enticing for the Elvenar staff to entertain and the can would get kicked down the road. Once the Elvenar staff dabbles into something new, they are more likely to integrate it into the game balance.