Sam has playoff experience as a starting guard. He is the best balhandeler behind Rondo while being pressured, with the lowest T.O. ratio... In playoff ball you want to slow the game down and keep it low scoring / low possesions. Sam shoots over Fish...
Yes, his game would change if as a starter, than a backup brought in for energy and yes, given a green light for 8 minute stretches.
Of course he is realistically a viable option.
Sam's assist to turnover ratio vs. House's this year is almost identical. 2.1 to 1.1 for Sam and 1.9 to 1.0 for House. That is basically exactly the same. Don't try and create phantom turnovers for House like a huge bunch of people on this board. No one still has commented on the infamous "House vs. Detroit" turnover debacle in which he had only 1 turnover.
If their points are virtually identical, their assist to turnovers virtually identical, and every single other category House is hands down a better option, then you give it to House. How people can still be saying Sam is a better option is absolutely crazy.
If they attempt to pressure House coming up the floor, he passed it up the floor quickly to Allen, or PP. We got quickly into the flow. Much more effective offense than when Sam has been in there.
If we need a backup behind House then there is absolutely nothing wrong with bringing Posey in with PP and Ray and the three of them are more than capable with mismatches to bring the ball up the floor. Problem solved.
I still think Rondo will be in there though.