I was worried about the bumpers too so I never got them. As a mom, you're allowed to worry about whatever you want! (That goes for dog moms too). I didn't see the breathable ones til recently but Sam stands in her crib now so we'll stay bumperless. At each stage there is something new to worry about!

With Sam I only use the pacifier leash on occasion but never when she sleeps. Turns out Sam likes the leash more than the pacifier and tries to eat it. I tried different locations but it is usually not worth the hassle. Every baby is different - you never know what will work!