They only franchise that they overuse is IMO Ratchet and Clank, but it's not like Sony has anything to say there. Insomniac wants to make them, do you really think that Sony would tell them to stop making Ratchet games?
Besides the Secret Agent Clank game is a franchise of it's own based on what I've read in this thread, so you can't really count it as a Ratchet game.
Jak X and Daxter are also franchises of their own, so since 2001(2002?) there has only been 3 games. Hardly overusing, don't you think?
Sony makes new franchises all the time, who made more IPs this gen, Sony, Nintendo or Microsoft? I think it balances out Ratchet and Clank. :P







