During the Beta I found it quite frustrating that for all missions it was a maximum of 3 players for a fireteam. If anyone else has more than 2 other friends who wants to play Destiny in a fireteam with you surely you would like to play with all of them rather than either splitting up or leaving them out.
I do understand that some missions are built for up to 3 people and any more would make it too easy but I was hoping that maybe they could optimise these for extra players. For example, the more players there are in a fireteam then the more enemies there are and their difficulty level is increased. This way everyone is able to face a fun, fair and decent challenge.
However, if it's not possible to do for a majority of missions then at least for Strike missions as these are already quite a challenge and would be a lot of fun to play with all of your friends.
I have added a poll to see how much people agree.