Just want to start off with saying that LH is a marked improvement.  I love the potential this game has.

A few things do bug me like combat and heroes.  Commander should get some armor and combat potential, and the other classes should give some army buffs.  Like how guardian has defensive and magic resist buffs for the whole army, the others should get the same treatment.

The weapons are a little disappointing.  Historically crossbows are easier to use than bows and have increased punching power but lack a bow's range and rate of fire.  In LH they can simply hit people who stand in a line which no one does in this game.  Spears are supposed to be defensive anti-cavalry weapons but they don't even get a counterattack in game.  So instead of the inconvenient powers associated with weapons why not make them a little more true to life.

Formations.  Battles are often won and loss based on unit formations.  Instead of a useless shield bash give shield wielding units the ability to form a shield wall to increase arrow defense.  Spears should get a spear wall or hedgehog formation that gives them counterattack either to swarms or whomever is attacking them.  Stuff like that.

These are just some thoughts of mine.