I too miss the old FeralHeart. It is taking some time to get used to these new maps, but at least we have the old maps available to download if you ever want to take a trip down memory lane.
Also, another reason you could be seeing a low number of people online is because of the time you play. Of course that all depends on timezones. I'm in the midwest US timezone and usually I get online anywhere from 4-7 pm my time and through the weekdays, it can be rather busy, and the weekends busier.