Yes of course. Do it for estetichal reasons.. and introduce 1h mode without shield for nasty trickery.
Good god, for this reason alone I would change my build completely. I would LOVE to be able to alter between one handed and two handed on morningstar, katana, long sword and bastard sword (are there any more?). Perhaps even give some one handed weapons a two handed mode?
Sorry if this comes across as derailing!