So he looses the Stalker Art at level 3, but nothing else.
He gains Judge Arts, which may be chosen from the Stalker Arts list at 7 and every 4 levels thereafter. Which incidentelly are the same levels he'd gain a Stalker Art anyways.
So is Judge Arts supposed to replace Stalker Arts from lvl 7 on, in order to add another option (Final Judgment)?
or
Does he get two Arts on each of said levels?
There should probably be a "This replaces Stalker Arts." in the write up. The name pretty much implies as much.