Considering we should end up getting more content, and that content should be pretty robust, and we should be getting the first part earlier, I don't see how this is a bad thing. Unless they don't do all that, then that sucks.
I see a lot of people are worrying about how things like the overworld or backtracking are handled. Would it be possible for each new part to simply add on to the original file DLC-style, keeping all progress and allowing all form of backtracking/all of part 1 content available after installing part 2, 3, etc.? Or is that not possible? Would the file be too big? Does that even matter? I don't know how any of that really works. Personally, if that is possible that would be my preference, rather than mass effect style of certain things carrying over, but everything being new and unable to truly connect.