The expansion isn't scheduled to open until mid 2023. To eliminate two jet bridges from a pair of gates would be a major design change, and almost certainly would have been discussed at a monthly meeting of Massport's Board.
https://www.massport.com/massport/about-massport/board-meetings/
I expect the two jet bridges per gate for the four new gates in expanded E will be there when it opens. I also expect the three gates in existing E that have two jet bridges will lose on of the two jet bridges during the $50 million Federally funded renovation of existing E. Logan does not need seven gates capable of handling A-380s. Even four is probably a gate too many.
All 251 A-380s are now delivered, with 123 going to Emirates. Unless Emirates decides to fly two A-380s daily to Boston, future appearances of the A-380 are likely to be no more than one a day from British Airways, Lufthansa, and Emirates.