So's the hardware, I'm not sure why that would matter much.
Battery is already soldered (basically), nobody cares. Aftermarket RAM upgrades only matter insofar as their historically being way overpriced at Apple, this seems avoided for now on the new MBP ($200 for the 16GB upgrade, Crucial asks for $160 for 2x8GB SODIMM so the markup extreme — least of all on a $2200 machine), the HDD -> SSD upgrade is irrelevant as it's already an SSD and if it's the same as the Air (no reason for it not to be), it's a semi-proprietary caseless and low-profile SSD module... for which there are third-party alternatives (or will be, in case the pinout is incompatible with 2011 Air pinout, which would be surprising)
You do realize all the "new" limitations of the MBP come straight from the MBA right? And that the MBA's been a raging success?