After crashing for the umpteenth time in Snowbourn, entering and exiting the mead hall, I noticed a trying to connect to the logon server error, tries 20 times then gives up. If you get this goto to system preferences>security and privacy> then click the lock. You need admin password for this. Then click Firewall options scroll down to find the entry for Lord of the rings online, select that then click the minus button underneath. The client should then connect. You will be asked at some point if you want to allow lord of the rings online to accept incoming connections select accept.
The client must be borking this firewall setting when crashing or at least not working with the firewall correctly after it crashes.
Edit: This did not completely work just now but when I added the Lord of the rings application using the + button it did work.