Yes the appeal justifies the two year lapse in your case. However, it was not needed. I always wondered about the delay for my case too but I got my answers when i ordered GCMS. I found that whenever I sent a query or contacted MP, they moved the file. I matched the dates of my letters, emails and queries with the dates they did some activity with my file, and they matched! All the other days, it was just lying there gathering dust. There has been no objection in my parents case and the interview was also waived as per the GCMS notes. So its just their laziness that is delaying the case.