I did flip-flop about whether it'd be more realistic for the Boston or Brooklyn 1st rounder to be sent to Portland, but stuck with Brooklyn. I've changed it so that it's Boston's now.
Houston definitely could use Lee/Bass, but let's keep in mind that they're also trying to compete this year while still having cap room for next offseason. Matthews saves Houston $1.5M. It might not see like much, but it's still an added benefit in addition to Matthews filling a need as opposed to Asik.
I disagree that Portland wouldn't take on Lee/Bass because of the length of their contracts. Bass is the same length as Matthews, and he also makes less, so that point is moot. Lee is on the books for 3 years at an affordable rate, which works perfectly with Batum and Lillard, who also have 3 years left. Beyond that, currently Portland is trying to trade LMA for a high-profile big AND then some (Noah & Butler). Obviously, that's not happening. With this trade, Portland maintains solid PF depth (Bass/Sully/Robinson) while adding on a great center and a competent replacement for Matthews, with a 1st round as a cherry on top. Keep in mind that Asik is the main coup for Portland in this deal, not Bass/Lee, or even the 1st rounder.
Also, I'd also like to add that Terry Stotts was a former assistant with Dallas, and he worked with Dirk extensively. As a result, he familiarized himself a lot with PF's who thrive in the mid-range game, and it's no surprise Aldridge spent more time than ever hoisting mid-range jumpers. Aldridge is competent at that area of the game, but he's far more efficient closer to the rim with his back to the basket. Bass would be an absolutely ideal pairing with Stotts, as he's one of the most consistent mid-range PFs in the league.