I'm not even sure what you're implying. That EA made them take out more direct squad controls or something? First of all Microsoft published Mass Effect and EA had nothing to do with it until the PC version in 2008. Secondly, that E3 demo was a just that, something they put together just for E3 and they even said after the game came out that, at the time, those were the only conversations in the game they had designed to that level of fidelity. It's pretty obvious from playing the game that it was rushed, so it's not strange if pre-release footage of the game looked quite different from the final version, because they started showing it long before they'd finalized the design (which they probably did quite late, which is why it needed more time). I'm just inferring that of course, but still.