It's the matter of succesful mindset to see opportunity where others see obstacles
This. Some people are on PvP servers...that's a bigger obstacle than having to find other guilds to down these bosses. So many people get wrapped up in expecting the content to be tailored to them, what ever happened to allowing BW to have creative freedom to build whatever encounters they want? I'm personally loving this idea that we need to get more people involved.
Has the amulet been tested in 8man yet? To assume that there is no 8man entity might be naive.
About 16man: All of the 16man final bosses (HM/NiM) have been more difficult than their 8man versions. Don't dismiss 16 as the easier content.