The prequel trilogy was terrible due to all the plot holes and contradictions that were made.
In the original trilogy when Luke Skywalker is in a memorable conversation with Princess Leia, the exchange goes as follows:
Luke: Leia, do you remember your mother, your real mother?
Leia: Just a little bit. She died when I was very young.
Luke: What do you remember?
Leia: Just images really, feelings.
Luke: Tell me.
Leia: She was, very beautiful, kind, but sad. Why are you asking me this?
Yet in the prequel trilogy their mother dies giving birth to them. It would be impossible for either child to have any memories of her. This is not the only flaw that was created by the prequel trilogy, the list goes on and on.
If episode VII ignores the prequel trilogy and stays true to the original trilogy I will have no problems whatsoever. Even if it causes contradictions with the prequel trilogy, as long as it stays to the original it does not matter. The prequel trilogy should be buried.
I am glad that episode VII will have more practical effects. The prequel trilogy had too much forced CGI. Also the lack of space battles in the prequel trilogy really grinded my gears. Especially when Obi-Wan Kenobi tells Luke in the original trilogy that Luke's dad was the best pilot in the galaxy, yet the prequel trilogy barely elaborated on this. It was such a missed opportunity, especially seeing as the space battles would have been one of the few instances that would have warranted the use of CGI, however this was barely tapped into.
I am optimistic towards the new movie. J.J Abrams seems to know what he is doing.