I don't think Detroit considers breaking up their frontcourt until the summer or next year's trading deadline. I would be very surprised to see them give up on a long term strategy so quickly and trade G.Monroe or J.Smith at this year's trade deadline.
I was kind of under the impression that part of their long term strategy was to sign the best players possible while under the cap and then adjust the line up later with trades.
Smith, for all of his imperfections, was paid about what he should have been (lower than the max). Det locked him up without giving up anybody - something pretty difficult to do with such major salary cap restrictions.
You had to believe that Monroe and Drummond were playing for the 'center of the future' gig while the other would be shipped out. It looks as though Drummond has cemented himself in that role and now Det either needs to trade Monroe or Smith for an impact sf...step forward Jeff Green.