I disagree. He's changed a lot over the series. It's true he was initially ruled purely by his dick but after the first major arc concluded he realises when affection truly is looking at him. When Power was throwing herself at Denji he felt just a sense of protectiveness and the need to comfort...
nooooooo! well the death flags were set from a mile away so I wasn't surprised but part of me was still coping that Utsuro would make it out alive. This is probably the author's way of resolving any possible future love interest questions lol