Mike,
As ususal, I don't know what you're trying to say
. This is what you did say:
"For many of these classic courses a new strategy can be created.The trick is to judge whether it would be the one the designer would do today."
Are you saying that the new strategy comes from holes evolving? Holes don't evolve, people change them or change the par on the scorecard as you touched on in your opening discussion. Or are you saying that holes can be changed to create new strategy?
Since you also said:
"The trick is to judge whether it would be the one the designer would do today."
You open up a whole can of worms there. Nobody can know what the designer would do today. I think many that do consider golf architecture tend to over-think what golf designers were doing in them olden days. To try and think as they would 70 years later is a bit difficult. Where an architect spent a great deal of time on site during construction or tinkered with the design over many years you can have a fair measure of certainty what the guy was thinking. There should be a carefully considered approach to change. If an architect was not on site, or not on site much and the detail work was done by a construction crew, there is not much to go on. There ought to be more license to try something better.
The Golden Age guys were not infallible. You can improve a design that no longer works, within some sympathetic framework is best.
As to the 17th hole at Rolling Green, I think you're missing some of the equation. For those that don't know, it is a sharp dogleg left 460-470 yards from the middle tee (a good 3 wood can go through the fairway) and 475-485 yards from the back tee (a good drive can go through the fairway). The very good player can hit a high demand draw uphill to a very narrow landing area pinched by a bunker on the left and trees on the right or throttle back off the tee as most do and play conservatively. For such a short par 5, I don't like this very much.
I think it better to lower the back tee and move it back and to the left along the line of play. A number of trees would need to come down to open up this angle (that wouldn't be too bad as it would bound to help air circulation and perhaps sun on the 16th green). This change would create more decisions and still maintain high shot demands. By lowering the tee and changing the angle, you effectively make the first shot farther than the indicated yardage increase and as full as you like. Yet a well struck drive can still be drawn around the corner to a small landing area, although only by a really good and long ball striker where he is rewarded with a chance to get on the green in 2. Driver is an option for everyone playing the back tee.
I think the middle tee might be lowered and moved left (the whole tee is rather built up on a downslope from the 7th tee down past the 16th green) and the tee a bit more natural in appearance. On windy days especially like yesterday (and this morning) play can be moved up to the front of the middle tee and you would have elasticity in how the hole plays relative to wind conditions.
An Old Guard member of the club, wish I could remember who, told me that the course was played so that either the 7th, 17th, or 18th was rotated as a par 4 (for vairety and depending on conditions I assume) and the overall par was 70. Currently from the back tees we play 7 and 17 as 5 pars and the 18th is a par 4 (par 70) and 18 is a par 5 from members tees (overall par 71).
I agree that par is just a number but it does impact strategy and results. As a relatively easy par 5, there is little demand off the tee and even the second shot on 18. As a par 4, the demands on each shot is racheted up. If it is played as a par 5 from the member tees, it should be all the way back to the unused back tee or moved forward and made a par 4 for members.