I was wondering if there are plans to make zombies less predictable. For example in buildings they sit/sleep in the same spot in every POI, there are few if any random roamers that go into buildings really. I'd like to see roamers inside the POIs in addition to sleepers and randomized amounts of zombies in POIs. Zombies would be neat if they have object point of interests they could interact with. Going into a POI you've been in before would be more interesting if you had no idea where the zombies would be before hand. For example, beat on glass, scratch at doors, pick up a weapon, try to unlock a door, pound on things with realistic sounds, knock over trash cans / partially breaking a door/wall and climbing through.
Tier 6 quests would be awesome to look forward to, something a group can do. The progression system is too fast as well in my opinion and biome bonuses are way over tuned. You could leave the system as is and let some end-gamers obtain unique and rare items that are hard or lucky to obtain to give a brass ring to people that play too many hours per day. People that play too much with an unhealthy gaming addiction need something that can keep them busy while the rest of their friends play casually. Lots of people play together with groups of friends, and you have certain friends who play 12 hours a day "consuming product" until they're done with it and bored then leave the rest of the regular people high and dry regarding friends to play with. Just a suggestion.