Trust me I get it. You want to have fun with your suit, but I think you can approached this from a fun perspective without the #menswear approach. It's already noted by several that the cargo pants look out of place and are way too skinny so I won't beat that horse to death, but some chinos or casual pants (shit even jeans) would work. Keep the non-chalance/sprezz if you want because it isn't ratcheted to 400 degrees with zany bracelets which allows it to work in this context.
Don't allow the sprezz to wear u. U WEAR THE SPREZZ