Not much of a fan of the whole PvP or co-op bullshit, but the solo time I had inside the PvE zone was actually quite fun. There's a certain Stalker'esque feel to the game while freeroaming the abandoned streets and buildings of NYC in search of loot or the next available mission. The strong art direction, atmospheric graphics and various weather effects make it even more enjoyable. Also loving the whole RPG aspect of leveling up, looting and customizing your gear, reminds me alot of Diablo 3.
I guess the PvE side will be structured a bit like other RnG based loot games. You'll probably get around 10 or 12 main missions to unlock all the wings inside your main base of operations, a couple of side missions to level up the base and some filler content like collectible pieces of intel or random encounters with mobs and other shit to grind your heart out once you're done with the main storyline. I can live with that, there was enough content in the beta for me as a solo player to spend an enjoyable amount of time with the game without even venturing into the DZ.
The DZ itself is where the fun ends for me though. The only thing that keeps me right now from preordering the game(incl. the season pass) is the fact that the higher rarity loot is supposedly locked behind the DZ. I understand the whole risk vs reward thing, but the way PvE, PvP and loot extraction is setup inside the zone is just penalizing solo players and leaving them open to all kinds of griefing and other scumbags. Imho there's no fun to the DZ if you are not into co-op play or don't have any online friends to play with in the first place. Which is quite a shame considering it's a loot based RPG. F#%k that... oh and also f#%k the added tension too.