And what rules did you create on lan2? Out of the box lan that is created has an any any rule that allows outbound traffic, when you create another interface opt1, 2, 3 etc.. there are no firewall rules and you would have to create them if you want any traffic to work.
So seems this e4200 could just be removed as it seem to serve no purpose other than your pppoe connection, which can be done on pfsense. Why would you not want to remove that? Its just something that could fail.. And complicates the setup with a double nat, performance hit if nothing else.