I think Lenamare does know Edwyrd exist. The ‘leave it to your bettere’ debacle while they were having a meal together should make the name Edwyrd stick to Lenamare’s mind.
As for Talarius. Sigh. He might had just become an ornament in the next book I think. He has nothing to do in the abyss lacking the necessary method to be able to travel practically in the abyss.
By the way. Tom pretending to be Edwyrd is a very powerful animage, as it appear to Maelen, wouldn’t that attract other animages attention? Powerful people never escape the spotlight really. In Edwyrd’s case, it seems that Maelen is gossiping about it with other wizzards and animages drawing attention to Edwyrd. That would mean that other powerful animages might appear and take Edwyrds measure. That might also attract some junior animages who wants to be tutored by skilled animages, which Edwyrd seems to be.