No OIS is a bit of a surprise, but again they were never going to give the 5X a stellar camera, something would always be taken out. I reckon it will be around the level of the LG G3 from last year, except maybe a bit better.
The G4 doesn't even have wireless charging, the 5X was never going to. USB-C should be quick by most accounts.
Again, no OIS is annoying but hardly surprising on a Nexus at that price point. Ditto wireless charging.
Now the 2GB RAM, that is a shock, gotta admit.
Clearly, the 5X is being priced aggressively, with some clear subtractions (wireless charging, OIS, RAM) but the camera will probably be solid, there's a fingerprint scanner, great speakers, the screen size is the sweet spot for most...
The X will be an everyday "champ" whilst the P will be premium, I reckon.
After all these leaks, the only real surprise is the RAM. Otherwise, I think Google will nail the presentation tomorrow.
FYI:
"Update: we've confirmed that the lack of image stabilization is, in fact, due to the new 1.55µm pixels in the image sensor. Presumably that means that the Nexus 5X will include an extra-dense camera sensor as well."