Other than Posey, House is the player that I want signed 100% as well. However if I am House, my requirements for signing me would be a no Sam Cassell guarantee. If he is re-signed I look elsewhere.
Backup PG = cheapest position to replace ... no need to rush.
Also bringing in Cassell FOR A FULL SEASON is a good idea still, assuming he can play. Last year was injuries, a massive shooting slump, and possible just joining the team too late. It is one thing to join the team late when you are a big, the job is much simpler, especially with no post offense responsibilities. But as a true PG, one who is best working off of isolation plays? that is probably stuff that needs to be installed in a full camp.
Put simply, Cassell did not put his best foot forward, but he also might not have had a chance to.