The case has been closed so what are you wanting from us?
It is normal for cases such as your one to take over a year to be resolved.
What did you expect , that it would be over in a week or so?, as far as I can see standard procedures were followed, the CPS always go for the highest possible charge as it can then be dropped to a lower level once the trial starts.
They could not do it the other way and start with a low charge and then increase it after a trial had started. I know you say your charge was increased to GBH but that was pre trial.
I can not see that you have any cause for complaint, these things do take time, some a lot more than yours took.