You can still think highly of someone even if you're enemies with them.

i like his money grabbing tendencies, gives him some character, rather than just being a stoic badass kenchiro rip off like jotaro. I really don't care much about jotaro, he was just a boring mc coming after joseph.

And of course he wasn't helping in the sheer heart attack because jotaro didn't want to put other people at risk, and koishi just coincidentaly found him and tagged along for the ride.

But yeah, i agree they should've saved his rohan antics to before killing shigeshi, that part was just badly placed filler.