Grubs are an issue but not nearly the biggest. There is some area on a couple fairways but most of the damage on fairways is disease or poor irrigation. I just asked and both courses were treated for grubs, on a summer that lasted as long and had as much stress as we have seen in a long time with temperature, humidity and lack of rain fall, things like this and crabgrass will break thru even if treated.
Your right on bunkers and tees and that is an issue but I was told they rarely have enough people to get by. Sometimes just enough to change pins and now greens. I have talked to them about labor and it is unreal what they have to deal with. Until that gets fixed, it will be an uphill climb. It is a extremely tough situation.
Another major issue is aerification. Nobody likes it but it is necessary. Big time. They do greens once a year and that is it. Most nice courses do greens twice a year and fwys and tees. Not sure when last time they did fwys and they pick a tee off here and there if they have people. If I had enough time to discuss the labor you would be blown away.
There is reason to believe this can improve, they can move this course from the 70s and update its skeleton. Until then people have no idea what kind of challenge it is