I'm so sorry you have to push back your trip!
The bright side is you will be going during a much less crowded time of the year! I would go in September if you can arrange it. The closer it gets to Halloween, the busier it will get, especially with more people coming in for Mickey's Halloween Party. Also, there is a Run Disney event in October. Fewer people go to the parks in September because school just started back and people are reluctant to take their kids out of school. I've seen a few people posting on here that they just got back or are at WDW right now and they are seeing very short wait times!

Plus, there are typically
free dining offers in the fall! Try to hang in there and dream of short lines and lots of Disney magic!
ETA: There are also dates in September for Mickey's Not So Scary Halloween Party if that is something you don't want to miss!