The hgg mod's new content is garbo for the most part. The lion's share of it is pedo and psycho content.
Some of the reorganization of the original content is okay, though. I always wished someone would tweak the horse dancer and her mom content so that romancing the mom was possible without being involved with her daughter. Not that the daughter was bad, but from that angle the mom obviously wouldn't be the main squeeze and that would be a nice alternate angle.
In general I'd prefer if the mod focused on adding unaccounted for variations to the original content, the stuff people mostly like already, to add more reasons to come back to it - but everyone always wants to write their own waifu.