If I think of anything I'll tell you. (Though I think all my how-I-wish-S4-went bits went into Some Feathers In My Hand.)

She wouldn't be capable of drawing devil's traps, I think. Depends how complete they have to be before they start working. Though she killed a demon in a devil's trap without apparently getting caught herself, by leaning over the trap instead of stepping in--or maybe we just didn't see Sam breaking it to let her out. We did a little later see her walking through no problem with a close-up of where the trap was broken.