I voted for AKL for the following reasons:
Only indoor corridors, I always felt very safe there!
Good counter service restaurant: as a solo traveler I would imagine that I would spend less meals at table service restaurants. I really liked the Mara and from what I have heard about the other deluxe resorts, it sounds that the counter service options is one of their weak spots.
It is one of the more affordable deluxe resorts, but also has slightly smaller rooms than the other deluxe resorts. It would still be plenty of room for a solo traveller, but if you are used to spread out when you are with your husband, it might be a great opportunity to try it now and also save some travel expenses.
The grounds are supposed to be very beautiful in spring - they were even wonderful in February. So if you like flowers, you might get an extra "festival" at AKL in addition to the official one at Epcot.
Even though it is further from Epcot, we found busses to AK very frequent and it is really easy to hop over there. We even used AK as a transportation hub quite a bit, e.g. for travelling to the World Show Case of Epcot: bus from AKL to AK, then bus to BC (or BW, whatever is the first stop). Might be a bit more time consuming, but saves a lot of walking!!
Whatever you decide: Have a great trip