The reason Princeton professors have more of an undergrad focus is the fact that there is no law school or med school (unlike most other ivys) Any a TINE grad school of around 1,000. This means the professors energy, support and office hours tend to be undergrad focused. My daughter has also not had a TA teaching any courses.
My daughter has gotten all A’s in her first semester. So I wouldn’t assume grade deflation will be a problem.She is very organized and focused. She also enjoys her courses and the other students in them. Some of her courses are only about 8-10 students and a few around 20-30.
After watching 2 of my children navigate college choices I can tell you that you will continue to have doubts until you pull the trigger, Once you decide its a done deal the pressure of choosing is over and you can embrace your journey.
Best of Luck!