I think people get too caught up with specific positions. It becomes an issue of having 2 "sf's" if neither could defend the position. Surely you'll agree that Granger could defend 2s. This would also create some matchup problems on the other end when some smaller 2s will be forced to covet Granger.
I really doubt that Speights is the dealbreaker for Memphis in acquiring the shooter they've long coveted to create spacing for Gasol, Gay, & Randolph. Regardless, if they think so highly of Speights they could keep him and we could send Wilcox, who would barely sniff the court, to the Pacers to replace TH. I guess this would mean we would be entitled to further draft pick compensation from the Grizz, so that's a plus.