Got a response here that covers both someones complaint about combat slog as well as the discussion about 2-Hander viability.
If you're grinding shieldwalls against one another then you're playing it more like a TBS along the lines of Fire Emblem. While that'll carry you through a good bit, and obviously is especially viable if you build a company around the tactic, I don't think it's optimal OR fun.
My best set-up, and I default to this now so much that it might be hindering my growth, is a shield wall with a center of miscellaneous one-handed weapons flanked by spearmen pushed forward a space to create a C shape and work dem flanks. While my ranged guys harass the back line and my shieldwall batters itself against the enemy line I have a berserker or two that hang out in a pocket behind the shieldwall. Once a hole breaks in the line the berserkers leap into the fray and batter the already worn down opponents. Obviously the plan deviates in the presence of a necromancer but, well, what plan doesn't?
While I feel like it may be an obvious strategy to some of youse, I've come to a realization over the past few years of lurking threads on games with tactical combat: people love to blow their loads as quick as possible. That is to say, it seems like standard internet doctrine is to throw the biggest guys in first and sweep up with everyone else. Sometimes it's best to use a zweihander as a scalpel. and hit at just the right place at just the right time. Not saying there isn't merit to the first strategy, it'll usually do you well. But the big guys in reserve I think needs to be kept in mind more.