Deathly Hallows: Holes in the Plot

*Warning: Do not read this if you haven't yet read the book and don't want your surprises to be spoiled.

Though this is the last book in the series and all the details needed proper explanations by the end of this book, I felt she left many questions either unanswered, or vaguely explained or she provided scope for a lot more newer questions:

*What is inside the locked room in the Department of mysteries?

*How did Lily and James escape Voldemort thrice, as in the prophecy?

*What is Harry, Ron, Hermione and the others' professions after 19 years?

*Wouldn't Griphook have ensured that the sword wouldn't disappear due ancient enchantments when it is summoned by the Hat?

*What happens to the Dursleys?

*If the Elder wand ensures unarguably victory to its owner, how did Grindelwald lose to Dumbledore?

*If you answered that Grindelwald did not actually own the wand, he stole it from Gregorovitch, so the wand didn't recognise him as his owner, then even Dumbledore couldn't have become its owner. And neither Draco nor Harry. Technically, if you need to defeat or kill its previous owner to become its owner, then Voldemort who killed Gregorovitch is the true owner of the Elder Wand.

*How is it that there is no scope of Voldemort beating Harry with any wand? Harry did not win by his supreme magical abilities. Whatever dear Voldy tried on Harry seemed to backfire on himself, not just in this book, but ever since the first book when he couldn't even touch Harry. Dumbledore could have as well taken Harry and made him stand in front of Voldemort. He would cast Avada Kedavra seven times, each time killing his own horcrux and finally would kill himself leaving Harry with nothing more than a face full of lightning scars, which Madam Pomfrey would rub off with a No-Marks cream. It would have been easier if Voldemort had used Wingardium Leviosa to lift a huge boulder and landed that right on top of Harry's head to kill him. He wants Harry dead, he wants to finish the job himself and he wants to use only Avada Kedavra to do it. Talk about a dumb villain who doesn't learn from mistakes.

* Gaunt mentioned in sixth book that the Marvolo ring was from his ancestors which contained the Peverell Coat of Arms, who were supposedly the descendents of Salazar Slytherin. If Harry was the descendant of Ignotus Peverell, wouldn't that make him an Heir to Slytherin? So were Voldemort and Harry cousins or was he his uncle?

*It's highly absurd that with the entire Ministry under his control and all the Dementors serving him, he couldn't catch three young teenagers who had cast simple hiding spells around their tents, roaming from forest to forest, frequently appearing out in the public and casting spells in Muggle-inhabited area. Also three youngsters stealing from the Gringotts makes it wonder if that's the safest place in the world or would it be safer to keep your possessions on a table in the Leaky Cauldron with a signboard requesting everyone not to steal as God would be watching.

*If Harry could get into Voldemort's mind and guess his moves and locations, how much time would it have taken Voldy to do the same to catch Harry? Why didn't he use Legilimency even as much as he did in the fifth book?

* Ron speaking in Parseltongue? Wonder why he didn't make use of this stroke of ingenuity earlier. And great to know the Basilisk corpse is still lying around in the building waiting to be used.

*So Voldemort thinks he is the only one who knows about the Room of Requirement to hide his Tiara and no one else would even stumble upon it accidentally. Showing his exceptionally brilliant mind considering the fact that the whole of previous year Draco was using the same Room to repair the cabinet upon Voldemort's own plan. And leaving Carrow to guard the Ravenclaw common room with the Tiara lying in the Room of Requirement?

*And what was she doing when she wrote that King's Cross chapter? How abstract could that be? Was he dead? If he wasn't why was Dumbledore there? If he was imagining, how was Dumbledore explaining things about his past which he didn't know? Or was it the Matrix world?

The point of pointing out all these is that J.K.Rowling must write another book explaining these mistakes and making more mistakes in the process leaving way for the subsequent books.
Yours hopingly,
Ganesh.