If ARI make the playoffs, they might end up doing the same thing that MN did, and keep Dumba for the playoff run, figuring that paying a 2nd for some help for the playoffs is relatively cheap, and worth it. In other words, make Dumba your TDL acquisition, and see where it takes you. Being able to compete, if not win, a playoff series would be a huge step forward both for the players, and the fans, nvm management and the general community who make a lot of money for every homedate played in the playoffs.
And if someone offers you a 1st(probably a late one) for Dumba, sure, you think about it, but doesn't that mean that he is playing really well for you, and might be worth keeping around?
Draft choices are nice, but at some point you have to ice a team. If Dumba fits in there(sounds like he already had one foot in the city prior to the trade), you could do worse than signing him as a veteran presence who still has some juice left. The West is the weakest I've seen it in years... it's not farfetched to think that ARI can be a playoff team.