Gladio's open shirt seems extra silly considering how slick and professional he was in the anime flashbacks! It almost seems really OOC after the anime. That being said, an open shirt level of silly fan-service on Gladio doesn't really equal a mechanic wearing a bikini, shorts, and high-heeled boots, and bending forward and over for fan-service shots. Gladio's also not perpetually posing during dialogue and cutscenes like he's in a photo shoot, it's really creepy how Cindy moves! I do like Cindy, though, she's likeable without being Prompto levels of over the top. I'd still have eye-rolled at a bikini, but a bikini with overalls and sneakers would at least have been semi-practical fan-service.