You don't have to only catch a bus to the front of EPCOT. You could take a short walk to the Boardwalk dock and catch a Friendship from there to the IG. Return trips from IG and exit at the Boardwalk.
It is much closer walking to the Boardwalk dock than walking to the bus stop, taking a bus to the front of Epcot, walking from the bus to the World Showcase. Same saving on your way back to the Swan & Dolphin.
Note: we are also impacted by this change and I was also surprised by the short notice.
Dave