i kinda skimmed most of these posts, but just lemme toss my 2cents out there.
sword spec is viable. however it has a low proc chance, can now longer chain proc, AND the biggest thing is the second attack can be dodged, missed, parried, glanced, etc. not to mention you might kill the person, then have a worthless proc.
i prefer my static 5% crit, & 5% crit damage bonus (225% crit damage bonus with impale and axe spec, meaning you hit for 1k, you crit for 2.25 x that, instead of 2x = 2k, small but it adds up).
all of this on top of the fact that axes (BoA, exe. cleaver, etc) are better than swords and maces imo. now dont get me wrong, i have a stoneslayer, ragehammer, and rockpounder on my warrior. i just prefer my axes and i always have; i was axe spec with kang in vanilla.
so you have an inferior spec (imo) with inferior weapons (also imo). viable, check. fun, sure. best, undecided. try it out, have fun, report back!
as for mace. with out the stun it seems kinda meh. passive 10% of battle stance + the talents could be fun, but i doubt it outweighs either axe or sword in the long run. again, test it and report back!!! especially since armor pen. was reworked, afaik, so clothies arent hit as hard...something about it scaling differnt, i have no idea tbh.