Just be careful you don't limit the number of stickers you're using on a sheet (unless you're looking to do it on purpose). Many of the brush stickers I've made use multiple rows, and columns, for specific purposes (Finer texture, lighter opacity, smaller images, reversed images, etc). Overlooking a change in the Pen Pressure column, might have you pulling only the stickers in a straight diagonal line across the sheet, leaving you with the same effect a single row sheet would allow. For example, if you look at my attached image, you'll see two different Variation Panel setups, using the same sticker sheet. In the first setup, the variations for Sheet Row and Column, both use Pen Pressure to change them. Doing this, however, means you'd be stuck using only the diagonal stickers on the sheet (circled in Magenta). In the second setup, the variations for Sheet Row are set to pull randomly, while I left the variations for Sheet Column set to change by Pen Pressure. This means you would have full access to the stickers on the sheet, but it will be based on the pressure put down. So if I pressed as lightly as I could on my pen, I'd only draw out the 1, A, Paw Print, and Burlap texture. If I pressed as hard as I could, I'd draw out only the 4, D, 6 point Star, and halftone texture. Anything in between those pressures, would result in a mix of the other two columns.
Nothing is easy to the unwilling.