It is true that there's not much to do as level 80 here. Also there are less and less people playing and that doesn't help either. True that RDF is not working, grouping up for dungeons or raids is harder, the bosses are more difficult than what you'd expect for a starter, raid setups are different, tactics are different, etc. etc.
But stop leaving the realm and moving to Icecrown!
Because things are going to get worse if you leave! There are less and less people playing here. "Only the most stubborn diehards remain" you'd say. But that's why you joined the realm - to experience a true hardcore reality, instead of a realm like Icecrown where you can just log in and play in a raid 24/7, without spending a year or two gearing up. Life is hard.
Don't get frustrated so fast, it's been barely half a year since the realm opened. It doesn't deserve to die like the old Lordareon did, with open transfers from other realms to fill the free space. There will be new content, just wait for it. It will be awesome again! Keep playing.