Yankees wRC+ is 89.
Adding wrist injured Tex and declining Youkilis isn't going to make this team a league average wOBA team. Not even close. They'll push to a 92-94 wRC+, but that's about it.
Did you forget that you still have Gardner (102 wRC+), Wells (100 wRC+), Ichiro (61 wRC+), Brignac (-84 wRC+), Stewart (75 wRC+)/Romine (-35 wRC+) starting for you??
And did you forget your pitching staff has not been very good at all? No starter has an xFIP under 3.70. Kuroda has been good but he's living off a .244 BABIP and his ERA (2.39) is outrageously under his xFIP (3.93).
That said, I'm very much looking forward to Buch vs Kuroda on Sunday. That should be an awesome game.
Oh and as a side note, I know the Yanks have struggled vs LHP, and that's where Tex and Youk will help, but they have been really bad vs RHP (.733 OPS). Adding Tex and Youk does not help them vs RHP at all, which represents ~60-65% of their games.