The development time on that game was also super rushed, compared to what the game needed. That's why you don't recruit any of the ME2 companions to be in your squad (since they could all die) and why so many decisions from earlier games didn't really pan out if you had a save where the decisions didn't match what Bioware was able to plan for/had time to develop. I absolutely wouldn't be surprised if they barely even got the ending they had finished in time to ship.