We;ve recently just come back from 8 nights at SSR & we had exactly the same dilema as you with whether to go with SSR or OKW.
We were in a studio, so the idea of have a bed & a sofa was nice at SSR compared to OKW 2 queen beds in a studio. However as your in a 2bed villa that doesn't apply!
When we booked SSR we requested our room in Congress park close to the DTD path, and we literally got it as close as it could get and it was less then a 5minute stroll from our apartment. It was lovely in the evening just to be able to stroll over and have a wander around, get something to eat and then stroll back without having to wait for a bus or boat.
It also meant we could walk to the bus stop opposite DTD to get the Lynx bus to Seaworld, Discovery Cove etc in less then 10 minutes.
From Congress park it was about 5-10 minutes walk to the carriage house with Artist's palette so that really wasn't a bother for us either. The pool at Congress park was pretty much dead every time we visited it with just a handful of people, the washing machines were always free too! It was just such a lovely relaxing atmosphere which was great after the parks which were so hectic!
We umm'ed and arr'ed for ages on OKW or SSR but im glad we went with SSR purely for its location to DTD. We never waited more then 15 minutes for a bus to any of the parks, and the buses were never full we always got a seat!
Hope that might help
