It was ... But I think there needs to be something more than that to reference Uncle Ben. Especially in that trippy Mysterio scene. The movie had an opportunity to deliver a huge emotional punch, and they didn't go for it. Don't get me wrong, that first encounter with Mysterio WAS awesome ... But a reference to what happened with Uncle Ben would have made it even better.
I think it's sacrilege to not include Uncle Ben in a Spider-Man story. I don't want a sepia-toned flash back of his death, but a reference to the cause of his death would go a long way for me. Heck, show me a flashback or two of Peter as a young boy hanging out with his uncle, even (just to show Uncle Ben meant something to him). The MCU has essentially made Tony Stark the "New Uncle Ben," which is a misstep. I loved Peter and Tony's relationship ... But Uncle Ben is VITAL to the Spider-Man mythos. Peter wasn't responsible in the slightest over Tony's death in Endgame ... Peter still needs Uncle Ben in his story. We all still need to understand what MCU Peter's catalyst was to become Spider-Man. In the MCU, we just see that Peter just wants to become an Avenger. We don't see that Peter wanted to become Spider-Man because he learned about responsibility in the hardest way possible, and I really do think that's what someone like Sam Raimi understands the best out of everyone who has adapted Spidey on the big screen.
Some initials on a suitcase aren't enough for me. Especially since that suitcase got destroyed at some point in the movie, and Peter doesn't even react to it. Not even an "Oh no, Uncle Ben's suitcase!

" moment. Uncle Ben is an afterthought in the MCU, and that's a damn shame.