If you want to change the kick animation to a shield bash when holding a shield, I could care less. But what you really seem to be requesting here is a right to left attack that can't be blocked. Or if you're saying it should be blockable, I also wouldn't care if you just wanted a really weak right to left attack for the sake of looking cool.
Granted, the hammer weapons also have unblockable attacks, but they don't provide wicked easy blocking against multiple foes, protection against arrows, and all the power of whatever you weapon is. Not to mention the lowest difficulty hammer is still 14 difficulty and crushthrough isn't even garunteed.