Canon 7D Mk ll advice please.

I have become quite disenchanted with my EOS 600D, not least because of the slow autofocus!!

Having read past posts, and numerous reviews, I get the impression that the 7D Mk ll would be the way to go?? I quite like the idea of being able to use my existing lenses. Is it really worth the hefty price tag? I would be using it  for bird/wildlife photography.

Any advice would be most helpful.