Dunno if we get a trade exception, but it doesn't matter. Danny has a TON of options heading forward over the next few years. It's a masterful display from a GM who knows what he's doing, has perspective, long-term vision... and the guts to pull off controversial deals that casual fans will be unable/unwilling to understand.
Humphries is an expiring contract too... since we're stuck with Wallace for 3 years, we might as well trade Humphries at the deadline to some team looking to dump another terrible 3 year deal... perhaps picking up another pick in the process. Ainge got a ton of assets/options considering KG and Pierce could be totally out of the league next year. Or like I said, Pierce could come back to Boston next year as a free agent and we could hire Kevin Garnett as a coach. At that point, those assets gon look mighty nice. Danny just needs to put cotton in his ears for a year ... in retrospect he's going to look like a genius.