If Eric Bledsoe and Greg Monroe refuse to sign long-term agreements with their respective teams by October 1, they will be compensated for the season based on their qualifying offers. Both will be giving up millions of dollars in "sure money" this year by choosing to wait until 2015 to become unrestricted free agents. In order to prove themselves worthy of max contracts, both Bledsoe and Monroe will need to have injury free highly successful seasons.
If Bledsoe is unwilling to accept a very reasonable four year contract offer from the Suns because he thinks some other team will be willing to pay him max money a year from now, he should not be considered a critical part of the team's future. Consequently, the team must work on the development of the players who will be part of their future (e.g., Thomas, Ennis, Goodwin). In order to accomplish that goal, Bledsoe's minutes will need to be drastically reduced.
Phoenix is a young team with very positive team chemistry and a very bright future. Very likely, with no max contract and reduced playing time, a disgruntled Eric Bledsoe will quickly become a very negative influence on the team. Monroe will likely have a similar effect on the Pistons. It makes no sense for either team to allow a potential cancer to disrupt their delicate team chemistry.
Phoenix needs a legitimate power forward who is able to rebound and clog the middle. Monroe fits that bill. By switching teams, both players will come in with chips on their shoulders and an attitude that they have something to prove. In addition, both will need to put their best foot forward in order justify a max contract. This should prove to have very positive rather than negative effect on each team.
In the end, if Phoenix thinks Monroe is worth keeping, they can make him an offer when he becomes an unrestricted free agent next year. If not, at least he didn't destroy the team's chemistry. Meanwhile, Thomas and Ennis will have a year worth of valuable experience playing in the Suns system without the negative influence of a disgruntled Eric Bledsoe.