The idea that the Wallace's contract is an albatross is ridiculous and simple reflects a lack of understanding of the CBA and how the salary cap works.
First off, Danny's first preference will be to stay above the cap. The reason is, that allows him to retain all his own FA rights and TPEs. So any big FA he tries to sign, he will try to obtain by sign&trade, if possible. For that, he'll need matching salary to send out. Wallace is a 1 year expiring contract that can match up to 15M of incoming contract. He's potentially extremely useful now for that purpose. Yes, sending him out as filler will currently require a modest draft pick as compensation to the team paying his 10M contract. But as a part of the cost of getting a stud player, that's more than worth it. And, if no deal happens until close to the deadline in Feb, the cost of moving his expiring contract actually goes down (because the prorated portion of his contract remaining will be much smaller).
Second, even if Danny DOES end up needing to drop under the cap and needing to get rid of Wallace's cap hit, he can be stretched, reducing his cap hit to just a little over 3M.
Wallace's contract is anything but an albatross right now. It is in many ways an asset.