I have mixed opinions about this game after playing a good amount of time on all the content that they've given on the Beta. The things I'd like to see improve are:
1. Holding down buttons for either continuing, leaving missions etc. take to long, the amount of time needs to be reduced.
2. The Crucible needs a lot of work to keep this mode balanced and enjoyable for me at least. You can get cheap deaths and it feels who ever plays the game the most to get the better gear will win the majority of the fights, or who ever has the grenade or special charge available.
3. The campaign was great at first, but than felt a little repetitive after seeing how you're going through the same building and such for different missions. I know there'll be different planets in the retail version, but a change of scenery in a planet and missions in different locations around the planet would be great.
4. The fire team size of 3 is too small for someone who plays with friends of another 3 players, seeing we're having to be in a group of 2 or someone gets left out. I understand they might not want to make it easy, but from what I heard, Defiance had it as the more players the enemies were tougher which I'd like to see. Having it as an MMO really feels the lack of social between friends.
Trading with other players will be enabled sometime after the game has been launched which I'd like to see.
There may be a bit more but those are the complaints that stood out to me.