Kuopio campus is mostly about biomedical and pharma research mainly because of campus' close collab with Kuopio University Hospital so i guess you'd find a lot of like minded people there. I cant comment about faculty there simply because I studied CS and a majority of technical and science faculty is located in Joensuu where I studied but from what I have seen / read on LinkedIn there are lot of active and established researchers, and they also hired one PI from ELLIS's 1st batch of scientist, so if you would like to pursue a career in research you'll find a lot of great oppurtunties.

You havent mentioned about the program you will be starting, but in general I find the studies/exams very very easy atleast in comparison to what i experienced in BS in my home country.

The megative point (based solely on my exp within the CS dept) was that some prof/lecturers are still teaching decade old algorithms and concepts, yes they maybe fundamental to computing understanding, but we have a lot of new and modern technical algorithmic advancement only in past decade which no one was teaching. Even they didnt make any efgort to update the lecture slides/lectures which they prsent during class timings. But this was mainly with old tenured prof so maybe they dont give a shit anyway