Scale is an interesting subject and one that intrigues me, especially for the hilly courses I really like. You get Painswick, Cleeve Cloud, Kington, Church Stretton and Welshpool all on very hilly sites. Yet Painswick feels very much on the small scale, congested even. However, there are a few breakout holes such as the 6th, not only visually, but the space seemingly on offer. Its an illusion, there isn't much space despite what the eye is saying. Cleeve Cloud is the opposite. There is massive scale for the most part, but in some cases the space is much less than it seems such as 5, 6 & 11. Plus, the greens and bunkers are small scale which really looks odd to the modern eye. Kington is the real conundrum because visually the scale is huge, but in real terms the course is fairly small scale with small greens and very few large features. It seems like one can whack it around, but on most holes this simply isn't the case. Etc etc.
Yes, unframed long distance views offer the impression of grand scale, but I wonder if how the hills are used is the key aspect. Sidehill holes especially play games with scale, but I suspect on many hilly sites, to keep a compact routing sidehill holes are a necessity. The fairways can visually seem very generous and yet play fairly narrow. Of course, the scale question also directly relates to equipment. These old hilly courses are short by modern standards, so modern equipment is not necessarily a good fit...meaning misses can be very bad misses whereas back in the day with old equipment is wasn't necessarily reload time.
I recall playing Wimbledon and thinking that Caesars Camp is an opportunity to create radically different scale with the rest of the course by eliminating trees and creating a large open area where all the Camp holes could be seen. On the dame course, I recall the bunkering on the lower holes not being in scale with the downhiill views. That issue was largely created not by the bunkers being to small, but by the there being very little difference in bunker size and shape. This is a main issue with pot bunkers as well. They tend to be small or at best medium size. When looking down on these bunkers they look silly when grouped...think of Trump Aberdeen in places.
I spose what I am saying that scale is important, but probably not as important as modern designers presume. Build something of interest and people won't notice scale so much.
Ciao