Pretty nice ideas overall. I’ll go into a little bit of detail about your current suggestions and the chances of them happening. I’m a Moderator who has been a enthusiast about the game before the beta, with that being said I am speaking on behalf of what I know and not representing Avalanche studios.
Wild animals I did ask this question inside of one of the streams that the Community Manager (Graham) hosted. I was told that there most likely won’t be anything other than the birds which are already in the game. This studio has another game called The Hunter Call of the Wild where you hunt games. In Generation Zero you are hunted instead of being the hunter. I feel as though the studio does not want the games to overlap with each other.
I would call the game more of an adventure game than a survival game. It does not have a lot of survival mechanics and I find it to be more of an adventure game, you could call it a survival game but the mechanics are very soft on the player.
Better in-game mechanics I’ve seen it suggested a few times and I’m all for it if it’s going to help reduce the amount of deaths I’ll end up with! I did feel as though that was one of the missing features in the beta.]
Comms Yeah would be rather nice, I’m always a fan of VOIP. If you don’t want to hear your team mate muting is always an option.
Body Armour I do enjoy the idea of body armour adding a lot more depth to the game instead of choosing what just looks better on you. On the flip it’s probably best to keep the game quite simple.
Gamemode
I feel as though adding this would add a lot more replay-ability for when you are your buddy’s are bored. Or something to do just when trying to just release some time. I don’t think it’d really fit into this type of game, I could be totally wrong though.
Distractions
Maybe not so much of a crafting system but being able to find more weapons to distract your enemies is a must. I must admit those flares are beautiful when thrown but a bit more could be added.
More enemies
There is lots of new enemies constantly being announced on streams, you should for sure check out the Generation Zero Youtube channel. The beta was just a taste of what was to come. It was also the easiest section as not to punish the player at all and let them experience all the mechanics of the game. Different parts of the map will have harder difficulty.
Vehicles
WOW! This has to be one of the most suggested features. So I’ll try my best to give you all the information on this, There has been a lot of suggestions before and after the beta for vehicles to be added to the game. With so many suggestions one of the hot topics is bicycles which is heavily suggested and won’t be completely game breaking if added. Allows you to absorb your surroundings and the immense danger the game is meant to make you feel instead of you racing past all the robots in your mustang. :’) My opinion is that the development team may add a bicycle but most likely not planes & cars as not to ruin your immersion in this vast world and allow you to explore more. Vehicles generally just add a shortcut and you miss out on lots of awesome features.
General destruction
I’m always a fan of destruction and it fits into most games. Regarding robots they do take damage depending on where you shoot them and it also decides what kind of loot you will gain from taking down a robot.
Aggressive bots
As stated before it was the easier section of the game I expect them to be a lot more dangerous later on. Them chasing you for longer would be nice however the developers would like running to always be an option.
That ended up being quite long but hopefully it gave you some insight. 
