I'm going to start work on an addition to the mutate filter right now to "de-dot" fields, but those fields will have to be named.
A de-dot, "shotgun-approach" filter will come afterwards. This will iterate through all fields in the event to catch and change fields. This one will likely be a very expensive operation as it iterates through all, but I expect there will be some who don't know all of the fields which might have dots. This solution will be for them.