Think this is where we're really missing Zenden. If we want Kewell up top, or just a more solid option on the left of midfield, there isn't much else to do except move Riise out of left back and bring in one of two inferior options there.
I wouldn't be entirely against goal line technology, but I'm not sure how you fairly restart play if the defending team is shown to have cleared the ball off the line and would've been on the break before play was halted.