3: Lower coordination. Most guilds have a high coordination which makes these new hardmodes seem easy to them. However, this doesn't include a PUG's perspective. Most pugs don't have coordination for the new hardmodes. So if people find it too easy, make a "NIGHTMARE" difficulty for hardmodes and have them yield ultimate marks.
Disagree with you there. None of the level 55 HM FPS require a high degree of coordination compared to stuff like HM TFB/S+V and NiM EC. Making a 3rd mode for an FP takes time that could be better spent making a new FP (Titans of Industry, The Imperial Warlord...).