You mean why didn't Psygnosis hire them again after doing the first game? Because it was all done in-house.
I wouldn't get too excited the team is totally different, the person who was primarily responsible for the original from TDR was Michael C Place and from the Psygnosis side Kate Place (now the company Build). TDR have the name but the people who were responsible are long gone and all have there own companies now.
Isn't this the reason Sony closed the studio because at the end of the day it just was not profitable and sales were not big enough to support them remaining open?