Everyone here acknowledges the Suns need for a center. It's by far the Suns biggest need. BY FAR!
Two were available last year of very high quality. Imperfect but still excellent.
The cost would have likely been 2 late first round picks. Picks which are almost certain to yield little value over time. That's what happens with picks like that most times.
This team would be a contender to win it all with either of those two players, and would have been very dangerous in last years playoffs. Had the Suns made the playoffs, Pau likely resigns.
In NBA currency, 4 quarters don't equal a dollar. It would have cost the Suns about 2 dimes for the piece they so desperately need.
The Suns, wisely, were not going to move long term assets for old players that were a quick fix. They made that plain all year long, and on top of that... and that you keep ignoring, is that Pau Gasol was injured. You can pretend he wasn't but a dude does not let himself get benched for no reason in a contract year. He actually TRIED to play at the start of April, came back for one game and was flat out horrible and clearly in bad shape. But in your world thats all an act.
As for Asik, the Rockets were asking for a quality first round pick for him... that means no TJ Warren, and his jacked up contract means the Suns would have had almost no cap room this summer, so no Thomas. That quickly turns into a pretty crappy swing for the Suns, and thats without my opinion that Asik, while better than our current centers, is nothing special in the first place.