This looks nice! I do think the dress packer, with it's sleeker shape, is more suited to dressy wear and I doubt they are easy to pull off but this is a fine example of doing it right.
SD's look great with chinos, especially more casual ones, no argument here. Still don't think they are suit appropriate however.
See, I look at the photo and think the exact opposite. "dressy wear" and pants bloused like you're in combat boots are just at the opposite end of the spectrum for me. To me, that just looks bad.