Maul/mallet are fine on battle, but totally over the top on siege defense. I made a mauler STF, and I would just stand on top of a ladder, off to the side slightly, and mash overheads while doing something else (paying bills, talking on phone, etc). I'd look at the screen occasionally and usually be #1 in kills. My main with +13 in looms only achieves this feat once in a blue moon.
When a class can top the scoreboard without even looking at the screen, something is wrong. I don't know how anyone could disagree with this.
Now, the 'solution' is up for debate. I say stamina bar with usage based on weapon weight. Heck, only having crushthrough weapons consume stamina would be fine with me.