Well, probably because I am so used to it, I think it will be better;
As things stand, your house, from what I gather, has several
bedrooms, so you are 'water-taxed' for a potential of, say, at
least 4 people living in the house, whereas there are in fact only
two of you. Surely there is a big difference in consumption between
4 people perhaps all taking one bath a day, and two perhaps
taking just one shower a day? plus the amount of washing etc...
and, most important, more toilet flushes (the biggest consumption
of water in most houses).
As for leaks, I understand it is not a pleasant prospect, but how
often do you have a leak in your house? and if so, I am sure you
notice it soon and have it repaired straightaway?
Would you not be able to adjust your house insurance so that
you are better covered in case of leaks?