Well, if Houston does that trade they have a starting five of Paul, Harden, Butler, Anthony and Capella. Great sounding lineup but actually a lineup with 4 guys whose games are best with the ball in their hands.
Then of course you are stuck with this awful bench:
Brandon Knight
Marquis Chriss
Nene
Zhou Qi
Micheal Carter-Williams
Gerald Green
James Ennis
Gary Clark
Isaiah Hartenstein
Bruno Coboclo
Vince Edwards.
So though Houston gets the best player losing Tucker as a great role playing 3 and D guy out of the starting lineup and Gordon as their 6th man could seriously hurt their team chemistry.
Knight is always injured
Nene is a shell of his former self
Green is allergic to defense and very erratic
MCW has been awful since his rookie year
Edward's, Coboclo, Qi, Hadtenstein and Clark have little to no NBA experience
That leaves Chriss as the only possible good bench player.