Its more just being done with all your lockouts, and all of hard mode an hour and a half into the week with a decent guild, or maybe 3 hours with some pugs..... thats not much But I guess 16 man would be more hardcore if it at least dropped more loot than 2 8 mans.
I know how you feel.
I'm waiting on the remainder of my guildies to hit 50 so we can start doing full guild 16's.
I refuse to take pugs to HM SOA or Nightmare bosses.
So as of right now we clear 4/5 with pugs in an hr or 2 then we're done for the week..and I don't log on at ALL unless it's to do dailies.
There's just nothing to do in the game..