I think that's a good idea - I'm not sure if it's worth a whole extra skill point, though. Maybe just a little extra experience. I think goalkeepers need to have their own specific stats though - they tend to gain skill points slower than outfield players and really the only ones that seem relevant are handling and positioning. So when you finally do gain a skill point and it gets wasted on something useless like marking or heading, it can be frustrating.

Maybe...

Reflexes
Handling
Diving
Decisions
Set Pieces