A new update coming very soon has increased the usefulness of 'Seeing Eye'. Up until now, I'm not sure I've seen anyone use it in a multiplayer game.
But now it is a lot better! It costs less mana to cast, and as well as revealing the fog of war, it reveals all the inventories and spells of any creatures within the cast radius. This is particularly useful in the Warlock Designer mode, as it gives you a hint as to your opponents tactics, and how to counter them!
I've also buffed the Blob Golem a bit, so he receives Throwable Blobs periodically rather than as a one off, and made a couple of fixes related to the Warlock Designer mode.