As a big fan of this game since Mod, i'd like to suggest some of my opinions, which might have been done before of course, but i didnt see them in the 2015 future plans.

1- Sleeping / Resting with Tiredness system

This system would work like, if you run so much, you'd become tired and need to rest by sitting, or lying on the ground. Depending on the tiredness level, you'll recover in due time. Also, when you log out from the game in a house, you'd have an option to sleep, and upon relogging after some time, you'll be energised/rested/whatever you call it.

2- Stamina

We are all aware that, running from Cherno to NWAF is actually not remotely imaginable in real life. So, as above mentioned, one should stop and rest after running long distances. Same for the zed's, as well.

3- Zombie mechanics

While chasing us, they would fall, stumble, crawl, hit the walls/fences, distract and stop following when they lose our sight. Speaking of "sight", they have a better sight than a hawk, i'm being aggro'ed from like a 300 meter distance :/

4- Eating/Drinking

We all know that, no human being gets hungry 5 times in a day (even if you're not an obese or something), so, this system may be revised. Drinking, however, thirstiness seems reasonable, as you're running long distances and losing water by sweating after all.

5- Item Spawns

While some buildings never have any item spawns in it, airport hangars have only boots and backpacks, and good old barracks barely provide a weapon (without a clip of course). Item distribution may be more balanced. Besides, whenever i need something badly, i can't find it even in military base. But, whenever i'm a fresh spawn, i find that item like 4 times in a row. I guess game depelops telekinesis with players, and acts inversely :)

6- Zombie Count / Threat

Well, i've left the most important one for the last.

What makes this game so irritating for most people, is the current game world situation. Zed's are barely a matter of threat, which actually should be the most dangereous and threatning things. So that, players are forced to PvP and kill each other for mostly no reason! I remember the good old mod zeds, we were crawling between them, trying not to distract them and making noise.

Well, this is a survival game, of course; but what makes it a survival, is an apocalypse, and the main element of this, are walking dead people. So, imho, zed's should be far more dangereous and threatning than the real players. Once the PvE element develops, players will be in need to each other to survive and wont kill in sight -at least i hope so-