Trust me, I have used precrushed grains for 5 years now and run a 12 bbl brewery. The beer will still be good, but it is always better when it is used sooner rather than later. the differences can be subtle but after you've brewed thousands of gallons you start to notice from batch to batch.
Finally getting an auger and a grain mill in November and I am expecting some improvement in the beer.
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I'm guessing you will see an improvement. Plus you will get to alter your crush to your liking. Really cool watching your hard earned progress. All of your beers have been fantastic by the way.