For what it's worth, one of the main ideas of
Permaculture is to mix it all up, make guilds. Don't put all the lettuce here, and all the tomatoes there, not all lined up so that even an injured pest could drag itself from plant to plant and
feed long
enough to reproduce.
If you like the oval and the paths, at least try to make different zones where plants help each other, spread everything around, use companion planting instead of monoculture rows.
And what I am not seeing in this planting arrangement is vegetable/herb/flower combo which helps the health of the plants, brings in beneficial insects and does a good
root exchange.
Then there's always hugelkulture to work into the mix.
:-)
An important distinction: Permaculture is not the same kind of gardening as organic gardening.
Mediterranean climate hugel trenches, fabuluous clay soil high in nutrients, self-watering containers with hugel layers, keyhole composting with low hugel raised beds, thick Back to Eden Wood chips mulch (distinguished from Bark chips), using as many native plants as possible....all drought tolerant.