Heading is fine, just in case he decides to head a corner off, creativity shud be there according to me, not sure but i think the GK need to be creative in thinking so as to read the shot well. Ya, Dribbling and crossing is totally unnecessary. The GK won't be going on solo runs so why does he need dribbling. And crossing???? Is he playing winger. Even 5 or 10 in both these stats shall work. After that, no more skill point shud get allotted to them.