Yes, we have to add somebody, the minimum players on a roster is 13 and Kings have to add bodies to make up the numbers. The point is, we probably have no room for a MLE guy.
Kings are deep in the wing position (at least in quantity, quality remains to be seen) , it isn't a big deal if Cisco or Beno or both goes down.
We're really not anywhere near as deep at the wing as we are in the post. In the post we've got CL, JT, SD, DMC, HW, and everybody anticipates JB covering two positions, or three guys per position. In the backcourt, in total we have TE, BU, FG, OC, DG covering three positions, or 1.67 guys per position. That's barely half as deep as the frontcourt. If you call Evans a PG and Beno a wing, we still have four guys (BU, FG, DG, OC) covering two positions, which is average depth at best. If Cisco and Beno both go down, as you suggested, we're looking at Evans, Greene, and Casspi going 48 minutes each the way we're constructed right now. That's a no-go.
Anyway, I would be surprised if we further addressed the frontcourt this offseason outside of JB. We need to add two to get to a minimum roster size, and I imagine one of them will be a 3rd-string PG. The other will need to be a wing, the only question being whether it's an MLE-type guy (Miller, Morrow) who gets minutes and deepens the rotation or whether it's a backup-type guy (Udoka, Landesberg) who warms the pine. I'm certainly not opposed to an MLE-type guy, because injuries happen. Why not be solid 1-12, giving everybody slightly lower minutes, keeping people fresh and having insurance for the inevitable missed time?