Well there could be a slew of other reasons for the PC shaft and they are just using this as an excuse. Personally I am torn on the issue between wanting to read every single thing I can about every map, weapon and ability in the game, and maybe wanting to be surprised. Though I guess most of that will be ruined by the beta anyway.
I'm not worried about the SP bleeding into the MP. It seems like the SP is a big story about your connection with your Titan. In MP that can't really be an issue or big element. I just worry about them adding in too much shit. A lot of people complained about there not being enough of a carrot to chase with the original. It's sad when near perfect gameplay is no longer good enough, you gotta have a progression bar to fill at all times.