I was asked about that on Twitter. The specific question was whether they could pull Lucas back from waivers and then try to negotiate a trade. The answer to that is “no”.
Also, on a side point, the DFA period was shortened from 10 to seven days in the new CBA, leaving less time to maneuver.
They would have to try a trade before putting him on waivers, which are irrevocable. Unless a team really wants him, they aren't likely to give much since they know he will soon be on the waiver wire for the taking.