Absolutely noticing this. Its really simple too. Lots of incapable players with the skill to get to level 50. Rewards are what people are after so if it is evident they won't complete the next 10 rounds.. why stickit out another 10-15 minutes. With the activity being abouty an hour to omcplete the 50 waves.. people may run out of actual time to play.. so they log out. If I load into a match already in progress and its evident why the last person left.. i'm not sinking anytime into it. Bungie just forgets how people play and consume their content. Maybe its worse.. maybe they don't really care at all.