User blog comment:Tiredman2/What DLC would you like to see in the future?/@comment-733050-20120813192729/@comment-24174486-20120814143652

"Personally, I think they should increase the amount of War Assets needed to get the Synthesis ending, that way only players you actually put effort throughout the series will be the only ones to get it."

ME3 had a lot to allow new players into the series without necessarily having played the previous games. Thus it would make sense that you don't have to play every game in the series to get the best outcomes in the end.

However, while you don't need the previous games to get the best final outcome, the best outcome of many of the plot arcs requires having played previous games in the series (for example, it's impossible to get peace between the geth and quarians without an imported save).

"It is arguably too easy to avoid the really bad endings, though."

It's almost as if you have to consciously make the worst decisions you can and ignore all of the sidequests throughout the series. Which may be why some people think that there are less endings than there actually is... XD