Just checking! The Cottage garden is in front of the house, on the right, with a hedge on the road side?
My initial thoughts:-
Think about what you'll see as you/visitors walk through the arch into a "room". Do you want to see what is growing on the end "wall" or on all the side "walls" at once, with the middle beds like a carpet or, do you want mystery, where you have to walk around the room to see what's growing in the corners?
You'll know what I would prefer and to create that you need to grow something tall or have a structure that blocks the view from one end to the other, so you have to walk around to see what there is. Maybe something decorative at the far end? or a seat for another view of the garden?
I like what you've done with multiple routes around the garden so that you never have to walk the same way out and back - a decision to make at every junction - this way or that one.
Have a group of evergreen plants somewhere to create winter interest. As I've found, when they're dotted about the garden in isolation, they don't make a statement and the winter garden can look a bit bleak.
.............and why isn't there a kale in every bed.