The biggest thing I noticed was how bright and colorful certain things are now. I had to turn my brightness down from a 6 to a 3. Certain things have a lot more color i.e. The crashed ship in the cosmodrome. I also got 4 blue engrams within 10 minutes of patrolling the cosmodrome, from mobs and chests(which there are a ton more of and easier to hear). I think the drop rate is for a limited time to convince you you'll be getting more stuff. I know that sounds crazy but last time they buffed drops, I had tons of blues and several purples, since that day no legendaries and just as few. Time will tell whether or not drop rate has increased. I also noticed a vandal major I was fighting had different looking knives, that could be because of the color/brightness alterations. And for that matter I fought 3 Fallon majors in 15 min in the first section of the cosmodrome and I've never noticed any there before. I only played for 15 min and that's what I noticed.