My point is that Riley WENT AFTER Miler, Haslem and Joel Anthony to the exclusion (as far as I could see) of any other possibility. That's what makes the decisions questionable.
Haslem brought a lot of chemistry and continuity to the team, though. It's hard to find a better player for $3.5 million. Also, I know it was reported at the time that Wade specifically gave back money so that his good friend Haslem could come back. Would he have done the same for a different player?
As for who Riley pursued, we have no idea. We do know that he attempted to resign JO, who declined to sign. Maybe he did go after other guys.
Now, in a perfect world where we can use hindsight, it's easy to see what Riley should do: he uses the combined $13 million given to Haslem, Miller, and Anthony and he signs Felton, Dorrell Wright, Ben Wallace, and Kurt Thomas. However, based upon the resources he had at the time, I think it's remarkable that Riley put together as strong of a team as he did.