The GV at OKW is fabulous...stayed there with friends a while back and have one booked this coming November. With a crowd, you will appreciate THREE FULL BATHROOMS plus a huge FOURTH bathroom on the main level with a very spacious shower (no tub). SO you have two baths upstairs (with two bedrooms) and two baths on the first floor(where the master bedroom is) , making it nice if you do have someone sleeping on the pullout in the living room. By the way, the laundry room is almost big enough to be a fourth bedroom!
EPCOT area resorts are great for convenience to EPCOT but I have always found the bus service from OKW to anywhere to be just fine. Plus, you can hop a boat to Downtown Disney area AND you will most likely have a peaceful golf course, woods, or water view from your spacious balcony at OKW. We also like that, for most of the OKW villas, your car is parked pretty much right in front of your villa.
Good luck!