There can be several ways of looking at this whole thing:
(1) All things are reconciled, meaning that each and every individual person, gnat, fly, mosquito, etc will be resurrected and reconciled to Yah. Yah certainly can make that work for us, but the quantity of insects produced by this scenario is a real problem for me to comprehend. It would certainly be a different world, this new creation!
(2) All things are reconciled, meaning that every individual person will be resurrected and reconciled to Yah, but all the rest of creation will simply be restored to its original, perfect state. All the gnats, flies, etc will not all be individually resurrected, yet new gnats, flies, trees, plants, etc will be a part of the perfectly balanced new creation.
(3) All humanity is reconciled, meaning that each and every individual person will be resurrected and reconciled to Yah, and the rest of the new creation will be pleasing to us, yet may not fully resemble in perfect state what we know here on the earth today. There may not be all of everything we know here on earth present in the new creation. Is there a law that says Yah must re-created everything just the way is was before, only perfect?