It wasn't about his "soul" with Boras, it was about his prowess as a business man. Boras lies. A Texas business man can not abide that. I think he'd compromise his ethics to sign just about anyone at this point. But I doubt he'd try to do a deal with someone he doesn't trust. The familar (bs line) "it's not personal, it's business" applies here.
I read a column recently (can't remember where, I think it was a New York paper) that pretty much said that the big fallout (according to a well known agent) from the Boras/A-Rod fiasco was that all the owners and GMs had confirmed for them what they suspected all along.
Scott Boras keeps his players in the dark about what the team is offering and saying.
According to this agent, the fallout is that now every team will demand to talk to the player directly and cite the A-Rod dealings as a reason for their concerns with Boras. If Scott Boras does not relent and allow a team to speak to the player, he will face the same scrutiny he faced in the A-Rod affair. So the big problem the Astros had with Boras was not only the lies and distortions but not being able to talk to Carlos Beltran directly (unlike the Mets who were because Boras needed them to peak the interest of the Yankees... who knew other than Boras that he would have serious interest from the Long Islanders and their owner?).
Many organizations will now insist that Boras allow the player free access to the organization and vice versa.
We shall see.