A core of Stroman, Sanchez, Osuna, Norri, Estrada and possibly Buerhle or Dickey isn't a bad starting point for next year. It would be nice to pick up a Tyson Ross or Andrew Cashner type to help stabilize the rotation for the remainder of this year and the next few years though.
I have to admit if AA makes absolutely no upgrade to the rotation before the deadline I will be disappointed. WIth this teams offence all a GM needs to do is assemble a passable rotation and BP and we should be very competitive.