Agreeing with so many points here, masculinity is the most erased gender expression for male sims in TS4.
I still play mostly male sims regardless of how few options they have compared to female sims, though.
One thing I would fix about beards, is in sims3, the way they grow almost straight across from the mustache instead of angling down, then following the jawline better, showing more cheek. They look so bad. At least sims4 beards have a better one shape.
Have enjoyed a mod that makes facial hair slowly grow, so the Sim has to shave, or else get stubble, then the stubble becomes a beard over time.