While Reggie Jackson is primo depth at the point for any team in the league, you can't fault either team here. Jackson can play some time at the 2, and will likely close out games there, the Thunder are likely starting Andre Roberson at the 2 this season because they need his size and defense. Jackson can't provide either.
And Jackson's role, while extremely important, is probably the easiest to replicate with a easily attainable player at a lower cost than Jackson will probably ultimately command in the open market. It's not unlike the situation the Clippers faced with Eric Bledsoe.
Looking around the league you can find similar production that Jackson offered from guys like Nate Robinson, DJ Augustine, and others. Finding a scoring point guard to play backup and start a few games if necessary is one of the easier things to do in terms of roster creation today. And the players coming down the pipeline in college are going to swell the ranks.
They'd trade 2 Reggie Jackson's for a Wes Matthews or the like. They really need a low-usage defensive oriented 2 who can hit an open 3 a lot more.