East End in June is relatively calm winds and seas on average as compared to the rest of the year. I wouldn't eliminate the destination from the list but you may wish to reconsider for other reasons.
East End does not offer shopping. Activities are available to the non-diver, but you will need a rental car. There is not much within walking distance of any of the East End resorts, including CDL.
Cayman Dive Lodge is a great operation and evokes a real family feel. It is strongly geared to the diver, so you need to evaluate what it has to offer for your non-diving wife for your special annniversary. CDL does offer plenty of peace and quiet for lounging seaside and relaxing and reading.
If it was my special occasion trip with a non-diving spouse, I would consider some of the nicer westside resorts or look into renting a nice condo or beach house. If my spouse is primarily looking for quiet relaxation, then I would also look into resorts and condos on East End.