Which is why I for one will be hoping they tank. Hard.
For goodness sake, you want something random to happen in your game? Make it up!
Ok, let me quote my friend, upon rolling a natural 100 "DM's Choice" on any number of random item/effect tables:
"If I wanted to choose the result, I wouldn't have rolled on the damn table!"
Seriously, you are hoping they will tank because they present an option that other players want? Some people like Wands of Wonder. Some people like random item tables.
Others don't. WotC seems to be working hard to support both groups, with the new DM's kit including both the treasure parcel system and random item tables. Is it really worth complaining about someone else being provided an option that enhances their game? Especially in the form of an entirely independant product that you can completely ignore if desired??