Horsepucky.
The gluing of the battery is one of the things that makes recent MBPs "enterprise class." Thinner, lighter, yet with no loss in rigidity, no extra creaks. And that eliminates any flexing of the motherboard, for further reliability improvements.
Meanwhile, elimination of RAM SIMM connectors improves package thickness and reliability, especially as RAM speeds escalate.
Those SIMM connectors are about the last connectors to go away on motherboards. Yet somehow I haven't heard a lot of whining about the lack of a CPU socket on MBP motherboards... and why's that? It's because those sockets added significant points of failure.
The only drawback is that purchasers must buy their RAM at the time of purchase, at Apple's prices ...which aren't too horrible, $200 to jump from 8GB to 16GB in the 15" rMBP, installed and Apple-warranted and supported. Compare to $126 from Crucial for the non-Retina MBP, uninstalled, and you're on your own for warranty and support.
Bottom line, you need to re-think your definition of "enterprise class." If it means less work for the IT department, that's a plus to me as a manager.
So you are a manager of IT in an apple environment? thats interesting, no sarcasm here, if you can tell me more, I would very much appreciate that you did so. (still no sarcasm)
enterprise class is always about the minimum downtime possible, oh wait the mobo crapped out on X notebook, the support from that OEM, will ship you overnight or send someone with the parts, I can very much appreciate the speed of that.
Other parts that are usually like to fail are also readily available, not to mention sturdiness, while well built, no way any apple notebook can take the beating that the thinkpads, precisions and elitebooks can. and it also avoids those bullcrap comments of hey if you spill coffee on your mac you are done for, because you have to pay more money for it to be repaired, I can do this at my house, I can spill whatever I want on enterprise grade, they are spill resistant
Im not going to enter the rugged business and really washed in a dish washer toughbooks, because its not the same targeted business.
another thing that macs lack are workstation hardware, they dont have, the cooling isnt enough and they just use consumer gpus, those ECC buffered vram exist for a reason