I'm not a STH but those that sat in Paxton Upper in the old stadium were offered North East corner, lower tier initially. From 25th May all STH's had the option to choose their own seats.
@ParkLaneMal will be able to tell you what Park lane were offered.
I expect that sometime later this month/early July there might be ST opportunities for up to another 20,000 bronze members based on loyalty points? for Wembley and subsequently in the New Stadium? after that, at Wembley I guess it's first come first served and pick where you want to sit from what's left. In my experience of viewing at Wembley, back of the lower tier (row 30 upwards) or front of Upper Tier (first 5 -6 rows) is excellent. I hope they blatantly advertise a 'singing section', that was sorely missed in the Champions League.