It is normal for these holes to get slightly enlarged, but yours definitely look ragged, like the countersink bit was chattering. Were you using an air-drill? I do all my countersinking with a cordless drill at low speed for much better control.
If you do use it, I would at least try to clean up those holes a bit. I'm sure it would be fine. Personally, I would make another one, because AEX is cheap, and I'd want every possible chance for getting that trailing edge as straight as possible. Enlarged rivet holes may allow for some waviness. That's all speculation, but like I said, the wedge is cheap, and if you're like most of us, won't be the first replacement part you'll be ordering from Vans soon!
Just my thoughts. But seeing since Vlad is flying (a lot, or so I hear), and I am sitting in my garage making airplane noises, his thoughts get more weight! Edit: I forgot that I pro-sealed mine as well. Do that, and I doubt you'll have any issues!
Chris