As far as weapon specialization goes, I think the current perk system works great. There are already lots of perk builds that greatly favor certain weapons, but don’t just give a boring ‘+5 damage to axes’; instead, axes naturally get a large damage bonus to headshots, and there are perks that increase your chance of hitting the head. Similarly, if you make a character with dodge and nimble it greatly increases you’re ability to make high damage ripostes with swords. Bloody flail is only useful with 2 handed weapons and flails.
I think more perks that favor certain weapon traits would be good, but am not interested in a simple ‘now you get +10% to hit with maces’ deal, no matter how it’s implemented.