Firstly, the Death Knight class leader will need to look into this, as we're currently comfortable with our melee setup unless you're a kitty. I have no idea how we can justify another Death Knight at this time.
Secondly, the fact you already quit after less than 2 weeks in the guild because you felt we weren't progressing fast enough for your liking and went to another is very off putting. Are we now expected to offer you a raiding slot over member who've sat with us for ours learning and tuning the encounters until we're now able to complete them, whilst you jumped ship because you weren't willing to put the graft in?
Thirdly, just because you weren't happy with the state of your class you deleted it. Even if we were to take you back on, what's to say that after you using a raid slot and loot that could go to other members, in a couple of months you won't get fed up of Death Knight and delete that too, or drop guilds if you feel we're not going fast enough in Icecrown Citadel for you.
Fourthly , you didn't even stick to the application template.
Don't misinterpret these as personal attacks, they're just questions that I feel are very valid.