To be honest, it has bothered me quite a bit that since Sims 3 it has been tougher to make male sims that don't look like a ken doll. It's a challenge to make a macho guy type sim.
And I like my sims to reflect all the kinds of people you'll meet in real life. Nothing wrong with positive masculinity, masculinity in itself is not toxic. Just like being feminine isn't bad, but making it hard for little girls to have clothing that isn't pink is.
So apart from making the walk styles affect some animations so that sims with the macho walk will perform various interactions in a more masculine way, there's more I'd want to see.
-Bring back body hair.
Most men don't shave off all body hair. Body hair being non-existent is just weird. They tend to have some hair on their arms and legs.
When sims 3 finally got that later on, it helped a lot with creating more masculine looking men.
-Add more facial hair options.
They rarely add facial hair options at all, maybe 3-4 got added since release. We need a lot more. Every expansion should add at least one option there.
-Bring alcohol back to the series.
It's rediculous they removed it. Let sims watch sports games with a beer. Show bad effects of drinking too much alcohol too. If sims can have the alcoholic trait in sims medieval and drink lots of wine and beer, why not have it in the main series?