Agree ... I would not line up all the seams across all the borders. The way I was taught was that you make the joins at random, though balanced spacings, and in whatever way makes the most use of your WOF. Something like this .....
-------|----------|------
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etc.
I looked at your pattern. If you are using the fabrics as shown, you will need to watch that you match the fabrics well. I think that would be very difficult if you join the strips on the bias. I would go with straight seams and baste the joins til you know it matches bang on!
Nice pattern .... look forward to seeing your picture of it.