I think (hoping) is it a part of a bigger plan and that dumbDoc is preparing for a trade by deadline?
They also signed Ayres for financial reasons:
The signing temporarily mitigates the tax savings the Clippers are achieving in the Smith swap. Ayres will cost the Clippers $55,722 in payroll, the same amount Smith would over the 10-day period, plus tax penalties if they’re still above the $84.74MM threshold at season’s end. However, the Clippers, who’ll be at about $95.5MM in team salary following the trade and prior to the Ayres signing, aren’t obligated to re-sign Ayres after the 10 days are up, a luxury that Smith’s contract didn’t afford them.
I really don't know, I rather liked the Rudy Gay trade rumors from a days or so ago, Stephenson and JSmoove trade for Gay would have been good for both sides I thought.
Instead they traded back the guy to the team that helped beat them in the playoffs last year so I really, really hope Doc has something cooking.