With all the veterans on the staff I think Grienke would blend in nicely and not be overwhelmed by expectations. He's a FA after 2 years, so if worse come to worse they can let him walk. If he pitches well, then there is always the chance of an extension down the road. I also think it's the type of move that really limits an advantage gained by NYY if they land Lee. A rotation of Lester, Buchholz. Grienke, Beckett and Lackey trumps anything league wide and by a lot. That kind of move put them as one of the heavy favorites for next season and that's with out any of the offensive ?'s answered.
I still think Beltre is gone and Youk is moving to 3B. 1B/DH/C is where the off season could go in so many different directions that we are going to have to wait for at least one domino to drop before we have any idea of the direction they are trying to go in. I don't believe they are going to want to clog 1B long term this off season. I really believe they have full intention of signing Agon next off season. I believe he is target A.Fielder I think is choice B and really a fall back option in their eyes. He has the most ?'s. If some how Pujols is a FA well then that changes just about everything.
As far as 2011 goes, 1B, DH, C could be filled with any combo of the following,
Dunn/Papi/Konerko/Pena/Salty/FA or traded for C.
The OF will get Werth or Crawford. Maybe a trade candidate we aren't considering. Or they could even try and go with the original OF from this season. Maybe Kalish gets in a year early. This will also depend on how much they spend on the IF.
Point is, if they add Grienke they probably will only need league average offense to compete next year. It could really be a big move.