How are you folding? Is it the cover that is making your ds uncomfortable or the Diaper?
As long as absorbancy isn't a problem you might be able to change how you fold to get a better fit. If you need more absorbancy then yup toddler prefolds are kinda nice. It's always easier to diaper with a diaper that fits and is easy for you to fold. If you do upgrade to toddler UBCPF you probably will need to go up a size in covers, med Litewraps (these run huge) fit my 30 lb 2 yo nicely over toddler prefolds.
As long as absorbancy isn't a problem you might be able to change how you fold to get a better fit. If you need more absorbancy then yup toddler prefolds are kinda nice. It's always easier to diaper with a diaper that fits and is easy for you to fold. If you do upgrade to toddler UBCPF you probably will need to go up a size in covers, med Litewraps (these run huge) fit my 30 lb 2 yo nicely over toddler prefolds.