The MBP is not all that "pro" any more. Soldered components, the bare minimum of USB ports, no RJ-45 ethernet jack. I'd be more than willing to add thickness & weight to one in return for those features, and better thermal management.
I don't think those features are what make it "pro". I prefer it being thinner and lighter with soldered components rather than heavier without. RJ-45's are terrible on laptops, they're ugly, bulky, and hardly used. I'd much rather just use USB -> RJ45.
You can point to any feature (excluding reliability) and claim that feature doesn't make something 'pro'.
I know one senior sysadmin - the kind of guy other sysadmins go to for advice - who's getting a Novena laptop as his next machine for work. That thing doesn't come with a keyboard and exposes the motherboard when the screen is up.
I've used the Ethernet controller on my laptop many more times than I've used USB 3.0. Heck, I used a USB/Serial adapter more times than I used USB 3.0.
