Just the YC/BC dock is being refurbished. I don't think boat service to other Epcot area resorts and between the parks will be affected (except for being a little bit quicker ). The other resorts were not mentioned in the advisory to cast members, which reinforces my belief.
For those who would like to walk to a nearby resort dock rather than take the bus, I calculated the walking distances from the YC/BC dock:
Epcot dock: 0.30 mi.
Swan/Dolphin dock: 0.36 mi.
Boardwalk dock: 0.38 mi. (via Dolphin bridge)
These distances are from the foot of the YC/BC dock. So the Epcot dock should be closest for the BC & most of the YC. S/D might be closer to parts of YC. S/D, of course, would be the fastest trip to DHS (assuming the boats aren't full).