Whereas I agree with your summary of his performance on Sunday, I feel you are being a little harsh to demand he is removed from the team, his contribution to this team over his time at the club has been considerable, his crosses into the box have resulted in many goals and he has also scored several goals, much of which have been match winning contributions.
He has also shown on many occasions that he is not "shite" in defence, however his mistakes have been costly.
I personally feel the positive aspects of his play far outweigh the negatives, he needs to concentrate more on his defending, but it is obvious that he is encouraged to get forward as much as possible due to his fantastic ability to play lethal balls into the box and his link up play with the forwards.
I hope he gets through this current sticky patch and leads us to the title this season.
PS, no one got pass marks on Sunday, we were a collective nightmare.