If they truly are interested in ET, which it sure seems like they are, it looks like they're playing it smart. Last report I saw, the Hawks wanted a 2nd Round pick for ET. That's a hefty price. 2nd Round Pick is expected to be a 5-10 year starter for your team, hopefully closer to 10. I like ET, but Dallas would be very lucky to get 5 good years out of him.
Trade-wise, it's clear the Hawks are not in a good position here. They have little leverage with such a talented yet disgruntled player. If I were Dallas, I'd wait until they submit to a 3rd Round Pick. Hell, if things got real ugly, I'd see if I could get away with a 4th first. It might get bad enough that Hawks just want him off the books. It's not like their cap space is good, anyway.
I like ET, but I covet that 2nd Rounder. I would rather keep the 2nd and see what we get out of the young guys this year.