I did read somewhere (magazine) that the added dihedral "enabled" the removal of the interconnnect but I guess they could have added dihedral with or without that change. The official reports I've read about the interconnect were about snagging/jamming due to mis-rigging found during 'full and free'checks. The reasons for the new wing were the manufacturing cost and weight reduction - recall the 'old' wing was for the SR20, and when the SR22 came along span was 'bolted' onto each tip. The new one-piece wing is fitted to both SR20 and SR22.