Having a UY that falls before your typical travel simply gives you more flexibility, IMO, if you have to change or cancel a trip.
If you are traveling near the beginning of your UY, this gives you lots of options for your points.
For example, we have a June UY and travel mostly in July/August. If I book a trip and then have to change it or cancel it, I have lots of options.
1. Any points I had used for that trip can still be banked as I have until January 31st to do that.
2. I can make changes to the trip up to 31 days prior without having to worry about the points. If the reservation is less, it doesn't matter as I still am well within my banking period.
3. If I make a trip with borrowed points and then have to cancel, I have 10 months to re-book a trip and use up those points since borrowed points expire at the end of the UY in which they are borrowed.
Now, take a different scenario where someone is traveling toward the end of the UY.
If I was traveling in the Spring with my June UY, I would have to make any changes or cancel the trip by January 31st in order to still bank points. If I cancelled after that, even if it was 31 days or more to avoid holding points, all my trip points would still have to be used by May 31st since I was past my banking window.
If that trip was in April, that would pretty much leave me only May to re-book. Since finding availability at
DVC within a month is not easy, there is a good chance I will lose my points.
Same thing with borrowed points. If I borrow points from a June UY for an April trip and then something happens and I cancel, I would only have a month to use them.
So, with your August UY, it really offers great flexibility for travel August through April.