I agree with this, except I'd make it a silver point- if one team is up after the first "half" of extra time, it's all over. I might go for 15 minute halves of extra time too.

What about some sort of silver point system?

Where once you've scored your point, the other team have 2 minutes or so to get a point of their own.

If they do, you start the whole process again.
If not, you win.

What happens if you had to play them in the game due to injury?

tough

or get your bottle boys on?

Which ever fan shouts loudest gets to come on!

Leave it as it is. It is exciting and it very rarely happens. Great for the neutral.