The no building is nice! in exchange you can climb up ledges which is needed in the first place! Sprinting helps as well which is an added feature. Some of the new guns are ok. I need to figure out how to use some properly. Also there are more mini bosses to fight for Legend weapon drops. Lastly tanks! really fun to use! The only bug I found so far is fishing. It doesn't save what fish you caught but it save your progress which last i played i caught 73 so far and i am getting the XP for each tier of the quest logs.