What I do with stickers I don't like.. even if the books are different.. find stickers that are close to the same color and like you said.. slap them down.. it turns out pretty good most of the time.
Not a fan of those small stickers either. I've seen a few planners use them to renumber/redate their weeks. I think that works best in the vertical or skinny layouts because of the space at the top of the page and boxes. BTW, I love the markers you used for the numbers!
