I don't know what you mean about screwing Dak and EE, but that's whatever. I could see it playing out a couple of different ways. Least likely would be the team letting Tony have a shot at the starting job in camp. I know everybody says that can't happen, but I don't see why it couldn't. Both Tony and Dak are the types of players who could live with a direct competition. There ought to be no shame for either guy to lose to the other, since they're both very good. And any deal would be for a one-year deal, only, after which Tony would have to move on as the contract becomes prohibitive. I know everybody says you can't sit Dak, but I'm not sure you can't. Tony's already proven he can be a good soldier with the situation calls for it.
The other option is just for Tony to take the clipboard, collect a big backup check, and enjoy the ride. Sure, he wants to play for a contender, but if a contender doesn't want him, then it's backup in Dallas or starter somewhere crappy. He probably prefers starter somewhere crappy, but with two kids, a pregnant wife, and the team contending right now, that backup gig in Dallas is not the worst deal in the world. He could end up with a Cinderella season as an injury replacement for the starter, you never know. Or a backup with a ring who only played in mop-up duty.
Like I said, I know both of these options are very unlikely, but they're probably both things he's giving some consideration to as he walks through everything in his head.