We’ve been getting a ton of Wish Crate items recently, which is great. What’s not great is that while we posses such items, we can’t actually buy Wish Crates with diamonds, thus the event is pointless. I’ve got over 1000 single items and 100 x10 items that I don’t want to burn in one go just to have a chance at the discount.
This is not the case for any other crate type. 
The event needs to be changed to like a ‘Bonus Wishes’ where the crate drops 2x items, or we need to be able to use diamonds despite having items in inventory.
Also, it’s kinda silly that we can’t see how many items we have from the Wish Crate screen, but that’s less important.