You didnt think I would stay away from posting here did you
I think anyone should make greens however they like doing them, but if pleasing as many as possible is something one is interested in, then the reasonable thing is to make most areas of a green (50-90%) be places where pins for the fastest speeds would be enjoyable, or in cases where you want a character of a severe green then at least have 2-3 different spots for that. I personally think 18 stimp is kinda ridiculous but I understand why some people enjoy it. Realistic pins imo means max 4% slope, and preferably max 3%. pmgolf posted this quote to me a while back which I think is quite relevant:
"John Sanford, president of the American Society of Golf Course Architects, says he has a rule of thumb for establishing pinnable positions on about 75 percent of the surface of the greens that he designs. “You can’t have a hole positioned anywhere where the slope is more than 3 percent,” he said. “Otherwise, you might just miss the hole, and now you’re 10 feet by, coming back. That’s not fair."
Sure, its possible that may be mostly with usual PGA stimp speeds in mind (I dont know), but I dont see why hackers on a municipal course for example would enjoy pins on more tilt just because the greens are slower... You can check degree of slope in practice mode with the BLI (one third of the bottom bar of the aim marker filled with yellow is 3.33% slope etc). Personally I try to make most my pins be within the range of 1% to 2.5% slope, which I think makes for the most fun golf with anything above 8 or so stimp, but for longer putts its nice if there is some steeper slope here and there to deal with. I also think there shouldnt be any big changes in slope within a 3 feet radius of a pin.
Imo greens having severe slopes is something that makes for fun golf, just dont plant pins there and have a reasonable amount of areas that arent severely sloping at the same time. Im pretty sure people playing on Fc/Fc arent asking for all parts of greens to be low degree of slope.
When it comes to replicating real greens, well I believe opinions differ but if we would only accept accurate greens then there wouldnt be many real courses at all to play would there? If there isn't a lot of info to go on, create something that plays fun and in itself is realistic. Hopefully at the very least there are pictures where one can discern the major tiers or general direction of slope for example and feature those to a reasonable extent. For most US courses you can make those two things out in Google Earth if you look closely. Not fully accurate, but the general idea. Asking for more accuracy than that is just a way of killing the designer community.