The other Walker Cupper from the 50s was Dick Yost. Bruce Cudd probably has the most institutional knowledge about C-E and Alderwood, a NLE Macan obliterated by the airport. Alderwood used to have the best players in Portland, they migrated to C-E when Alderwood closed. There was a smaller defection to Pumpkin Ridge when that opened. The architect who is making changes at C-E is Dan Hixson who has a long history with C-E.
Most of the corridors and routing remain from the Macan era. The 15th hole was changed from a slight dogleg left with OB threatening the green to a dogleg right with the green set into a swale. The 13th was also changed. Greens which I know are not original are 1,4,5,6,9,11,13,14,15,17. Greens I know that have not changed from the 1960s are 2,7,8,16,18.
When comparing Columbia Edgewater against Waverley and Portland, rmember the latter courses are USGA favorites with membershiips to match. In fact they ar more of match play courses than stroke play courses. You will see much more players walking at C-E. Waverley and Portland have more severely contoured greens thatn does C-E. The two clubs also have more elevation changes and use those to good effect. They are also much more quiet. Their greens and contours lead to more others than you would see at C-E.