the thing is though some people do get exotics easily but some don't, outside of the ones you get from quests i haven't had many exotic drops from mission rewards since TTK, and i used to do nightfalls and raids weekly (though i haven't been playing that much since RoI came out) so without 3oC i would have been screwed and even with 3oC it seems to me that there is a much higher chance of getting exotics you already have over new ones so i use them more for shards and light level than actually farming for new exotics