It appears to me that having the last hole as your toughest hole could present a problem in match play with handicaps. If your opponent get 2 stroke for the match and one of them is the 18th, he might never get a chance to use his stroke (I can't imagine Merion with 16, 17 and 18)... and if the match come to 18th all square, then the player with the stroke can play safe all the way make bogey and win 10 times out of twenty, square nine times and lose once...
It seems like classic courses have either a victory lap hole where you need to work had to make more than a bogey (for tour players) St. Andrews, Turnberry, Olympic Club... or a real brute where anything is possible, Carnoustie, Oakmont, Merion, Muirfield, Pebble Beach, TPC Sawgrass...
For my part, I like it when a course doesn't finish with its climax, because you can't recover from it... You can always recover from a 6 on the Road hole with 3 well played shot that would give you a birdie at the 18th...
walking to the last green is to me a time to reflect back on the round and enjoy it... It fun to have a hole that could lead subtlely to a 3 or a 5 (on a par 4) not where your faith on the last hole is decided off the tee...