Lanolin adds more moisturizing and lubricating properties to the lather. You really don't need a scuttle, any appropriate sized bowl will allow you to do a bowl lather to mix the ingredients up. Kind of hard to do that face lathering. If face lathering and using a particular soap work to your satisfaction there is no real need to try other methods and mixes unless you like to experiment. If it ain't broke no sense fixing it.

Time is also a consideration and when I was working there is no way I would spend the time I do now on my morning shave routine. I just face lathered and shaved away and not with a straight razor either. Being retired I can indulge myself each and every day to a slower and more luxurious routine including of course a straight razor.

Bob