My MSc thesis from 2016 critically evaluating the solution to the Ship of Thesis problem which denies that there ever was a ship to begin with (mereological nihilism).
tl;dr I thought the solution lacked explanatory power, particularly in terms of the sciences where it does not seem possible to collapse the "higher" sciences (biology, psychology) down into the "lower" ones (physics) whilst accurately describing the world.
Grading is different in the UK to the US but I got the equivalent of a high B, not enough to get funding for the PhD I wanted to write on thought experiments! (Required an A and I was 4% short.)
The main complaint was that I spent too much time doing an exegesis of what other philosophers thought and not enough time developing my own ideas. To be fair I think that makes for better content for sharing here since what professional philosophers think about this issue is probably more interesting than what this wannabe philosopher thought.