Close Quarters combat, is not necessarily limited to close range techniques, or to taijutsu, and kenjutsu. You could use elemental jutsu in short range, although you might injure yourself. Close Quarters combat tends to have a high risk, high reward, type atmosphere. In a lot of cases, you can end a battle with a single blow, especially if using a weapon. Although, the reverse is also true for the opponent. It really depends on your own preferences, some people gain a large arsenal of close range weapons, CFS, and jutsu, and fight exclusively in close range. Now, a lot of jutsu in the taijutsu and kenjutsu list can be done with freeform, that is not using a jutsu and describing what you do in words of your own, so if you don't want to waste a jutsu slot, it might be a good ide a to use them instead of an actual technique. In addition, you can dodge a lot of kenjutsu/taijutsu freeform without using a jutsu, but not all.
Any questions?