I'm in relatively good shape in SS in all of my leagues, even though I have feast-or-famine Jhonny Peralta in one of them.
When Tulowitzki hit the DL, I had Theriot as a spare. Not a massive loss there, I'd say.
As for Stephen Drew, I've been quite high on him heading into this year, thought he'd make a Troy Tulowitzki 2007 ascension, even. I have him in a dynasty league by dealing Tom Gorzelanny for him in the offseason and while I don't start him because of my offense being jam-packed (Reyes is at short), I like his production, as it's above-average for what you can call a 3rd tier SS (your Peraltas, your Greenes, your Orlando Cabreras) and he's in a good spot hitting in the 2-hole for Arizona.