Actually, the specs and features were already locked down... Now they're finishing up the engineering and design. So thia thread is kind of dead.
Regarding your suggestions:
2.5" drive is too big for our body. We will have M.2 form factor for the SSD. It's not removable, since Eve decided that thin body is the priority, but they promised that it won't be too hard to open up the device, so you can probably replace it if you want. However, SSDs are quite long-lasting nowadays so you probably won't need to do it at all.
I think we will have a microSD slot instead... Not sure why they did this decision, I think something related to design. I too wish we could have a full-size slot. It would allow larger storage and easy transfer from cameras and other devices. It's a no brainer for me, just like USB vs. microUSB: always have the larger one if there's enough space for it.
Not possible. Can you find a device that's under 1cm thick and still has a removable battery? A Thinkpad battery alone is twice as thick as our whole tablet...
Bluetooth? How could anyone release a device without it? It's one of the "default" features that nobody even thinks about... Like WiFi and capacitive touchscreen