Congratulations on improving as a player!
I feel very much like I am in the same boat as you, just that when I started my journey I played a resto druid in s3 so I never went below 1700 rating (purely due to class though, I had 2 keybinds at the time!
)
Also, I have to ask, what server are you playing on if you're one of the top teams on that server with a 2400 rated team? That sounds like a really bad PvP-server imo, not trying to be rude, just making a statement =)