The more I look at this deal the more I like it for OKC. Check out Yogi's post above for the break down of why it really makes them such a dangerous TEAM.
The improvement of Gasol over Perkins would be absolutely HUGE. Their team becomes so much more versatile and he still has that edge that Perkins hangs his hat on. Same rebounding, more scoring in the low post and he has a good mid-range shot AND he knocks down 80% from the line. Plus he is one of the best big man passers out there, which is going to open up a lot more shots on kick outs.
And then Conley is obviously a step down offensively from Westbrook, but is a much better floor general and with KD, Gasol, Martin, Sefolosha (and himself) that scoring punch is replaced and then some. And the defense improves as well.
Its hard to advocate for a trade when you are sending out the best player, but I would do this if I was OKC. Memphis would probably rather keep Gasol and Conley to bookend their reboot and move Z-bo for more pieces/cap room, but if the Thunder put up Westbrook, Perk, Lamp, PJ3, and Toronto's pick could that be enough return?
With that new OKC lineup I'd have them as favorites over the Heat. I think OKC definitely can win it all as is, but that new lineup is such a better TEAM its a scary thought.