It's strong from where I am sitting
FromTheShire: I think the utility of exiling a true problem is often worth them drawing a card
Format shifts, tournament results, and the occasional move nobody saw coming can push a card from a forgotten bulk rare to a forty-dollar cash grab before most players even notice it's happened
Just make sure you keep an eye on your opponent's board -- you could easily become overrun by your opponent's Creatures as you're grinding incremental value with Deep Sight copies
That's why it's better in a 40-life format like Commander, rather than 20 life
While going first is a large advantage, when youre playing effects like Cartographers Hawk, Land Tax, and its cousins, you might think about not going first