Hmmmm. In that case... If, by some sort or divine intervention, Aiden managed to survive Pratt's attack, it would've been a good reason for the team to work together to catch Pratt. Since Aiden was once a part of the team, and a friend, they would've certainly be motivated to solve the case. It might even help Lindsay show a more compassionate (?) side. But since the " the team visiting an injured friend at the hospital ending " card has been taking by Flack in COTP, there was no way they were gonna repeat the same storyline in the same season, especially with the episodes so close together.