Is your Gold par based on this, by length only?
http://www.pdga.com/documents/par-guidelines
Makes sense, as those 400' Par 4 become Par 3, I'm sure a good number of Par 3 become Par 2.
Those guidelines are one method of applying the real standard which is the definition in the rules.
When scoring data is available, I use a method where par is the lowest score where at least 75% of the throws by the typical 1000-rated player are good enough for par. This 75% figure is the limit. Any hole that comes near having only 75% of throws be good enough for par is very tough to par. Any tougher and it would be higher par. On average, 90% of throws by 1000-rated players are good enough to get properly set Gold par.
Close Range Par can also work well (but close range ought to be 200 feet, not 100 feet).
Another method that works is based on average score of players that average a 1000 rating; but not just rounding the average. The range for par 3 is 2.56 to 2.75 and the range of average scores for each higher par is 1.2 bigger than the previous.
Another method is asking an expert (1000-rated) player what score they would not be unhappy with on each hole.
Another method is finding a course total score that would be rated about 1000 to 1020 and allocating that total par to each hole by difficulty.
None of these methods will produce as many par 2s as you might think. There were none at Harry Myers, for example. The definition is pretty strict: for a hole to be par 2, the tee needs to be in close enough range that an expert expects a 2. That range varies by the difficulty of the hole, but the numbers I've run show that the very shortest par 3 is probably 165 feet, and the very longest par 2 is probably 285 feet.
Most of the problem of too-high par is the longer 3s being called 4s, and the longer 4s being called 5s.
Another big problem is carelessly using the course par for MPO competitions when course par was set for Advanced or lower skill levels.