They have arguably used up most of the big names they could too, though it's great having a format which mixed comedy veterans with newbies. I just hope they stick to primarily people from the world of comedy rather than opening it up to general celebrities.
Nonsense, there are plenty of people left in the comedy world who they could get to take part, and plenty of new talent coming up. There's a big well of comedians from previous generations to dip into too
Remember though that it is used very much as a showcase for Avalon talent, as well as Alex Horne and Greg Davies every series has had at least 2 or 3 Avalon clients, particularly the newer talent: David Baddiel, Rose Matefeo and Ed Gamble in the case of this current series. They won't run out
List of all their clients here: http://avalonuk.com/all-clients/
Ash101 and Blake Connolly gave kudos