The gore in this chapter is there for a purpose, part of the big messianic prophecy in 2nd Samuel 15–20. There are multiple stories in this chapter that are worthy of attention and note. This chapter has lots of parallelism and chiastic structure. For example, the actions of Yoab (Joab) mirror those of the high priest and of Yehudah Ish-Kariot (Judas Iscariot) in his betrayal of Yeshua (Jesus).
Ziba comes to David with some of Mephibosheth’s wealth and brought it to David on the pretext of pledging loyalty to David. Ziba tells David that Mephibosheth has purposefully refused to flee with David and stay behind to possibly gain the throne for himself. This chapter structured to highlight betrayal to show us that a particular individual, David was betrayed and that His descendant, the Messiah would be betrayed in a similar way.