Seriously, most people talk about adding SSDs and replacing drives: it already has an SSD that is near-as-makes-no-difference fast enough to saturate the SATA bus. People expecting to get the one-time boost they got from going to a 5400RPM drive to a blazing-fast SSD won't ever experience that again until we push past SATA interfaces. The 16GB of RAM you can option it out with is also pretty close to not only the limits of practicality but also the limits of the chipset. So, those points are moot. Max out the RAM and pick any SSD and you'll never need to touch them during the lifetime of the computer, and if you could, it wouldn't have any real effect. The SSD is even socketed so--should it die--you can replace it.
And, sure, the screen is hard to replace, but it's not like Apple's ever been the pinnacle of upgradability anyways. What were you expecting, a socketed processor and some thumbscrews so you could drop in a new chip? Whether you know it or not, this serves the needs of well over 99% of Apple's market for the MacBook Pro, and if it doesn't serve yours--if you really insist that you must be able to replace and/or repair every single component in your computer, then a Mac wasn't for you in the first place. Two Thunderbolt ports and two USB 3.0 ports further drive the point home. I do, like many of you, lament the loss of the "hacker" ethos that enables us to modify our computers and drop in new parts, but we're kidding ourselves. This isn't a new state of affairs and we're making a mountain out of a molehill.