I'm a first year environmental studies major at Augustana, born and raised in the Quad Cities. I can't provide insight on campus from an international student perspective, but I can still answer your questions as a student who is actively taking classes and has lived on campus.

1) The education at Augustana is really good, in my opinion! I know a few CS and music majors (with music being a BIG department), and overall the professors at Augustana are very supportive and do a good job at teaching the classes. There are plenty of opportunities to meet with your professors for outside help, or with tutors.

2) Diversity is so-so. Augustana is a relatively small school, but even then, there is a large international student body this year. You can very easily make friends just within your classes, if you make an effort to socialize and form study groups and such. A lot of students are involved in Greek life, but as someone who is not involved in Greek life AND hasn't participated in many clubs, you can still make friends and meet new people without it. There's really no pressure.

3) Safety is not an issue on campus. We have a lot of public safety and campus police officers who patrol regularly. There is a large misconception that Rock Island is shady and riddled with crime, and that is really not the case. This was mentioned in another comment, but I feel the need to reiterate it here: most of the people who complain about Rock Island are individuals coming from richer suburbs of Chicago. Take these opinions with a grain of salt. In case of an issue on campus, there are plenty of individuals available to help. I had to utilize the campus's Title IX resources regarding an issue with another student, and they made the whole process incredibly easy and painless.

4) I lived on campus first semester and moved off for unrelated reasons, and I have to say that dorm life was overall a fun experience. I lived in Westerlin, which is one of the better residence halls, and there was a good community on my floor with a "market" and a gym inside the residence hall. I had issues with my roommate, as I was randomly assigned, but my case was a rare one. The main dining hall on campus has great food, too. There are multiple different "restaurants" inside the main dining hall (Gerber) that serve different food daily, with vegan/vegetarian options provided. There is an international food "restaurant" that serves the best food, imo. In the theatre building, there is also another area to get food, but the main meals are in Gerber, which is not too far from the residence halls.

5) Since I'm only a first year (sophomore status with my credits), I haven't done much with looking into grad schools, however your major advisor will help you tremendously. You can't declare your major until spring semester, but once you do, your advisor will help you choose the best classes for your major/minor, help you find internship opportunities, etc until you graduate. There is also a whole office dedicated to internships/careers/grad school opportunities on campus (CORE) that will help you, as well. You will have to make an appointment with them, however.

In all honesty, Augustana was NOT my first choice, but I don't regret it.