While they do help to define your warrior, they also seem restrictive. It seems inevitable that you'll reach a certain point in the game where you can absolutely murder everything with a mace because you chose all the mace-related perks. However, by doing so you've also watered down your options when facing tougher enemies because anything but a mace simply won't do the trick. You've also blurred the advantages of choosing that weapon type since you invested so much into it that the unique armor-ignoring features take a back seat to the raw damage you would do against any type of enemy. Instead of becoming a situational weapon (in this case, against armored opponents) it has become the go-to weapon for every situation.
Again, that's not a bad thing if you have something else to show for that investment as well. Instead of simply leveling up other skills to help remove some of the boredom of your mace warrior, why not include some "active melee perks" that could really add things to your playstyle even as you specialize?
*By the way, there may very well be perks like this in the game, I'm just voicing the doubts/concerns I have if there aren't any because Fallout didn't have that many.
The extremely simple solution I thought of, and am hoping to improve on or scrap for a much better idea someone else could provide, is to have some activated perks (like a whirlwind attack or whatever) dependent on your stamina. Active perks would be chosen just like any other perk but would maybe be linked with a passive perk. For example, maybe you need to invest 3 perk points into a passive, tiered "two-handed swords do more critical damage" perk before being given the option to chose an active two-handed sword perk that would allows you to swing and knock people over while your character is running or something.
That's it really, I'd like to hear some opinions. I'm not doing a poll because none of this really matters anyway. I'm just doing this for my own sake really... and anyone else interested in wasting time until the game comes out.