My two cents:
Ideally, lock status and locking (I get issues with unlocking, long term I hope a voice password system like with purchases on Echo might be implementable) for each lock, and the ability to make groups to lock at once, like a subset of the functionality for Hue lights. Any extended functionality above that seems like dressing - I hope one doesn't need to ask Alexa about the handedness, but maybe battery status? Or asking who locked/unlocked the door? They're all niche cases, it seems, and maybe we should use the IFTTT channel for tinkerers (or some method of explicitly seeking out an expanded feature set).