Not having dimension and weight doesn't bother me in the least. If I show up and it doesn't fit, it ain't my fault. The main reason not having dims and weight doesn't bother me is because many times the shipper themselves don't yet know what the dims or weight will be, especially with auto freight when they are trying to build the parts as fast as the can and will ship whatever they can have built by the ship time. It's very understandable to not have the numbers when the call is placed for the truck.
It's also understandable, albeit infuriating, when the requested floor space is lost in translation amongst a sea of 3PLs by the time the load gets to my QC. It's infuriating because the shipper requests, say, 14-feet of floor space, and you show up with a Sprinter, and he looks at you like you're a friggin' moron with one of your thumbs well hidden. I love being put in situations like that. It helps keep my personal and diplomatic skills stropped.