People tend to keep using what they are given.
For hexes that means the default writing pattern.
Many patterns are drawn differently but look the same.

In my opinion it would be a big upgrade to use a different starting orientation in the examples. Most people will use those in their spell circles as well. If it becomes common, you can actually read a spell circle without picking up slates to find out what they are.

For example:

Top iota to third position - Swap first and second iota - Third iota to the top

And none of the patterns have to change, just the default orientation in the guide book.

Why do I want this?
Well, I wrote a big spell circle. Looking through my own hex got really annoying, so I just started making all my patterns unique: