I wouldn't read too much into the letters' wordings. Most of them are generic and are not tailored to specific applicants. If you are really interested in seeking feedback for your application, you can try emailing the department to ask for one. I am not hopeful that they will provide useful feedback though. A remarkable exception is when Alexander Guerrero (Rutgers' Director of Graduate Admissions) personally provided quite comprehensive feedback for rejected applicants.) This was quite a massive effort as he sent out 103 such feedbacks! I doubt most programs will put nearly as much effort into providing feedback as Guerrero did. But hey, who knows, there might be more Guerreros out there, so perhaps worth a shot!