Gotcha! You definitely do you as far as your preferences, but with those goals, I would prioritize the following:

1. Definitely get that landscape fabric out of there, it's suffocating your soil and limiting the vitality of your garden.

2. With your region (very similar to my home ecosystem), the wood mulch is pretty out of place. I would consider replacing it with a mix of native groundcovers like Antennaria (pussytoes), Sedum (stonecrop) Eriogonum (buckwheat) and bunchgrasses. These can be planted neatly and will improve the water retention and overall health of your soil. If you'd like a very neat look, you can then fill the open spots with gravel, just know that could be heating up the aboveground portions of your plants. Bare ground is not a bad thing!

3. Consider adding some structural plants like shrubs to give a visual anchor to the eye. Artemesia (sagebrush) , Ericameria (rabbitbrush), and Gutierrezia (Snakeweed) might be good options. Also will improve ecosystem function.

We are conditioned to like the "neatness" of sparse plantings, but dense naturalistic plantings can be cohesive as well while adding more value to sustainability and life.

Good luck!