One thing to remember here is that "being discussed" might only mean that the Clips reached out (again) about KG (or KG and Pierce), and Blake ended up in the "discussion" because that's who Ainge initially asked for in return.
In other words, "being discussed" doesn't mean that the Clippers were open to that package; they very well could have responded to a request for Blake by saying, "Not a chance in hell, Danny, but thanks for the laugh".
On the other hand, in Simmons' two-part "NBA Playoff Questions" article from Friday, he mentioned that Blake and CP3 seem increasingly unhappy playing with each other, and if trading Blake for KG/Pierce is what it took to convince the best guard in all of basketball to re-sign with the Clippers, it begins to look a lot more reasonable.
Still, I'd assume that IF Blake was really discussed, it was because the Clips are legitimately interested in KG and Pierce, and Ainge initially asked for the moon. If it really happens, though, I'd be much more likely to be Bledsoe, DeAndre Jordan, Caron, and filler, and maybe a future 1st from the Clips, or something like that.