I too have had an email.
My understanding, from the little snippets in the planning documents and drawings, is that for most of us it will just be an increase in the row number, as they add 3-4 rows as the lower and middle are joined together.
The gangways will potentially be to/from the street level exits at the lower, with the middle exits removed and covered with extra seats. So any one in the Trinity Middle in line with the lower exits might have to move.
Also any one in the corner in front of the big screen / McGregor's Lounge will have to move to accommodate the new corner pavilion.
