East Hampton voters on Tuesday had an easy task in choosing among the leading candidates for the town board. With more than 1,000 absentee ballots still to be counted, we expect that the margins between Fred Overton and Kathee Burke-Gonzalez will shift, but that the winners’ column will not. Much as we are sorry not to see Job Potter take a victory lap as the board’s elder statesman, the leadership equation of the group that will be sworn in come January is solid. And necessarily so — the way ahead will be full of challenges, some immediate, some long-term.