The end will not be reset nor will the dragon drop an elytra or egg. As edo has put it, there are many players who have built bases in the end. By resetting the end, you essentially wipe the work that they've done away. If you think this is ok, think of it if those end players decided to wipe away your overworld base after spending months on it. Same difference.
Elytra's are considered an end game item and Ren has determined that it should remain that way. That is why we have a minimum price on the Elytra set at 200 diamonds. Not enough to be unreachable, but enough that if you really want one, you're going to need to grind for it. That being said, there are playerbuffs that can be purchased which add haste to the server for a period of time. This will help you mine those diamonds faster. As Peter said, it shouldn't take you long to get those diamonds.
As far the Dragon Eggs are concerned. There are a limited amount of them on the server. When the server first opened up there was a glitch where it dropped it upon each death. That glitch has since been fixed. We do not allow people to break bedrock so there is no purpose for Dragon Eggs except for decoration.