I like the big ones as well. I don't agree with the divider or small crate when they are puppies. The 'theory' for it is they won't potty in it if there isn't room. The truth is they do not like to soil their bedding area and they will not potty unless they absolutely have to. For new puppies I put paper in the back half and bedding in the front half so if they do have to go they have an area to go in. They will go on the paper area if they need to potty.
I've had enough puppies as well as litters to know their instincts. Puppies as young as 3 weeks will go outside their whelping area to do their business if they are provided the space. When they are young they have to go often and should not be expected to go all night without a potty break.