Jiko is my favorite signature restaurant. We were there 3 weeks ago, looks like right before the new menu change. Everything we had except for dessert is still in the menu. We went during the F&W Festival so DH and I shared everything. We had the cheese plate, bobotie rolls, peri peri chicken, 2 baskets of bread (just can't help it, it's so good!) and dessert which I can't remember what it was now. I had the lemon verbena tea with dessert. It was all fantastic as usual!!
If you are on the dining plan this might not work, but you could order just appetizers, salads, etc and desserts. We've done this before.
I think the service, atmosphere, wines, etc are worth it alone to go!! With a little creativity I think you can come up with a meal you would enjoy and wouldn't skip it just because you aren't thrilled with the entree selections. Plus they are pretty flexible adapting a dish to your tastes so that is something to keep in mind as well.
Hope you get to enjoy Jiko!